Time Machine is a key selling point for Leopard and the Mac. It is more complete, and yet simpler, than the built-in backup feature in Vista Home Premium, the most popular home version of Windows.

But Time Machine has a major drawback: It works much better on desktop Macs than on laptop models. That’s because it’s primarily designed to operate with backup hard drives you connect directly to the computer. And it’s a pain to plug a backup drive into a laptop, which can move around the house. While Time Machine will work with a remote hard disk under certain circumstances, that option requires a second Mac running Leopard, a costly condition.

Now, Apple (AAPL) has attempted to fix the problem with an unusual new companion product called Time Capsule. This is a $299 stand-alone networked gadget that packs both a giant hard disk and a speedy Wi-Fi wireless router into one slender case. It just plugs into your existing home network, and any laptop within wireless range can connect to it. It can back up multiple computers.

Time Capsule is designed to seamlessly work with Leopard’s Time Machine. But it can also be used as a wireless Internet connection, and/or a remote hard drive, for manually storing and retrieving files by Windows PCs running either Vista or Windows XP, or by Macs running Apple’s older Tiger operating system. And you can also use it with certain other backup programs, such as the ones built into Windows XP or Tiger.

In my tests over the past week, Time Capsule worked well in all of these scenarios. However, Time Capsule isn’t meant to do as many different tasks as some other networked drives.

Apple stresses that Time Capsule is a limited, targeted device meant primarily for backup — especially with Time Machine — and as a wireless base station. Unlike some other networked storage devices, like Hewlett-Packard’s MediaSmart home server, Time Capsule doesn’t allow users to simultaneously stream music or videos to multiple PCs, to easily access its contents via the Web or to stream videos to TV sets.

The $299 Time Capsule model comes with a 500 gigabyte hard disk inside, and there’s also a $499 model with hard disk that can hold one terabyte of data, or roughly 1,000 gigabytes. Both models use the same “n” class of Wi-Fi, the fastest version with the longest range. Both also work with computers equipped with the older “g” and “b” versions of Wi-Fi.

You can buy networked hard disks in these sizes for less money and simply use them with your existing Wi-Fi router. However, Time Machine won’t work with them, according to Apple. The company says the only standalone networked hard disk Time Machine can use is Time Capsule.

In my tests, Time Capsule performed perfectly with Time Machine. It also was easily recognized by several of my Windows machines running Vista and Windows XP. On all of these machines, I was able to speedily access the Internet via Time Capsule. Time Capsule can be set up to either replace or supplement your existing Wi-Fi router.

All the machines, even the Windows ones, also could recognize the Time Capsule as a remote hard disk, and save files to it and retrieve files from it. For instance, I manually copied a song, a photo and a Word document from a Mac laptop running Leopard onto the Time Capsule. On a Dell running Vista, I then opened the Time Capsule and launched that same Word document in the Windows version of Word, opened the photo in Vista’s Photo Gallery program, and played the song in Windows Media Player. This same process worked in reverse.

Apple doesn’t guarantee that Time Capsule will work with all backup programs. But it says it will work with the backup software built into Tiger and will likely work with some other backup software.

In my tests, the built-in backup program in Windows XP Pro worked fine with Time Capsule. But the built-in backup program in Vista failed. Microsoft said the problem I encountered was due to a new Vista security feature for backups that foils some remote hard disks, not just Apple’s.

Setting up Time Capsule was easy, using a step-by-step utility program that Apple supplies in both Mac and Windows versions. The device has a USB port that can be used to add either an additional hard disk or a networked printer. And it can be connected to a network via a wired connection if you don’t want to use its wireless functionality.

If you use Time Machine on a Mac laptop, then Time Capsule’s $299 price is money well spent. If you don’t, there are cheaper or more versatile solutions to the backup problem.

• Email me at mossberg@wsj.com. Find all my columns and videos online, free, at the new All Things Digital Web site, http://walt.allthingsd.com.

Many others keep their landline-phone service grudgingly, only because it is needed for things like fax machines. But even they often use their cellphones at home, because their friends and family members dial their cellphone number routinely, and their personal phone books are inside their cellphones.

But there is a big drawback to using a cellphone at home, especially in a large house: You have to schlep it around with you from room to room. By contrast, landline phone service can be used via either cordless or corded extension phones. Now, T-Mobile, one of the big U.S. cellphone companies, is rolling out a new system that it hopes will make cellphone service at home more convenient and even cheaper to use.

The service, being introduced this month in two test cities, Seattle and Dallas, allows you to use a cellphone account with any corded or cordless home phone, with multiple extensions, for just $10 a month. That very low price gets you unlimited domestic calls.

This new T-Mobile service, tentatively called Talk Forever Home Phone, is likely to be available nationally in a few months. It works via a special Wi-Fi wireless router that you must buy, with a two-year contract, for a one-time charge of $50. The router, which can either replace or supplement your existing wireless router, is essentially a stationary cellphone that marries an in-home Wi-Fi network to the T-Mobile cellphone network.

I have been testing the new system and found that it worked well, and it was extremely simple to set up and use. For my tests, I used a cordless phone supplied by T-Mobile, which included a base station and one extension handset. I was able to make and receive calls all over my home in exactly the same manner, and with exactly the same quality, as I do with my normal cordless landline service.

While T-Mobile is selling this cordless phone as a $60 option, it isn’t necessary for use with the new $10 service. The only new hardware that is required is the special Wi-Fi router.

However, there are some significant downsides to the new T-Mobile service that might make people think twice about dumping their landlines. For one thing, it doesn’t work with fax machines, home-security systems and other devices that rely on dial-up modems. Also, unlike landline phones, it doesn’t automatically transmit your home address to 911 emergency centers. You have to manually supply that address to T-Mobile during signup, and the company then sends it to your local emergency center.

Another downside: You must be a T-Mobile cellphone customer to buy and use this $10 monthly home service, and your T-Mobile plan must either be an individual plan costing at least $40 a month or a family plan costing at least $50 a month.

Finally, while you can transfer your current landline phone number to this new service, it cannot share your existing T-Mobile cellphone number. So people who are used to calling you on your cellphone will still do so, and you will still have to race for the cellphone or carry it around to receive those calls. You also can’t transfer your cellphone’s address book to the new home phone.

The special router is made by Linksys and looks very much like a typical Linksys router, except for the fact that it has two standard telephone jacks in the back and slots inside for T-Mobile SIM cards, the same kind that are inside a T-Mobile cellphone.

You can use the special router as a replacement for your current Wi-Fi router, but I just plugged it into an existing port on my old router, inserted the SIM card, and then plugged the cordless-phone base station into one of the phone jacks. It worked immediately, and didn’t affect or degrade my existing Internet service.

In addition to enabling the phone service around my house, the router was also usable by my computers for Internet connectivity, though it doesn’t support the new, fast “n” flavor of Wi-Fi.

This new system is not a so-called voice-over-Internet-protocol phone system, such as Vonage. It doesn’t carry your phone calls wholly over the Internet, but merely uses the Internet to get them to the T-Mobile cellphone network, which then carries the calls as if they had been made on a cellphone.

T-Mobile says the system will work fine even if you don’t have T-Mobile cellphone coverage at your house, because the call doesn’t rely on the cellphone network for its first leg and only is routed to the cell network once it reaches a T-Mobile switching center.

If you are a T-Mobile customer and can live with this system’s drawbacks, the $10 monthly fee may be hard to resist. But this new system is far from a perfect replacement for landline phones.

• Email me at mossberg@wsj.com. Find all my columns and videos online, free, at the new All Things Digital Web site, http://walt.allthingsd.com.

But in recent weeks, I’ve been bombarded by reader emails asking for Mac-buying advice. So, here’s a quick guide — a sort of Mac FAQ — to shopping for a Macintosh. As with my Windows guides, this is aimed at average, mainstream users doing typical tasks, not techies or businesses or hobbyists.

Q. Who should consider a Mac?

A. Pretty much every average consumer using a computer should at least look at the Mac. It combines gorgeous hardware with an operating system I consider superior to Windows, with better built-in software. It can even run Windows programs if you buy and install a copy of Windows. And unless you do that, you won’t be vulnerable to the vast array of viruses and spyware that threaten Windows users. Only a handful, so far, have been written to run on the Mac operating system, OS X.

Q. Who shouldn’t consider the Mac?

A. People who spend much of their time playing cutting-edge games should stick to Windows computers, because there are far fewer games written for OS X. Apple doesn’t offer hardware tuned for serious gaming. People looking for the lowest-price PCs should also avoid the Mac, because Apple’s cheapest model, the Mac Mini, costs $599.

Another group that should shun Apple’s computers are people who depend for support on corporate IT departments that are either ignorant about, or hostile to, the Mac. Finally, if you know and like Windows, and expect mainly to use Windows programs, stick with a Windows PC.

Q. Can I run Microsoft Office on a Mac?

A. Yes. Microsoft makes a Mac version of Office, which uses the same file formats that Word, Excel and PowerPoint for Windows have used for years. A new version of Office for the Mac is due in January and it will handle the new file formats Microsoft introduced this year. But the Mac version of Office omits Outlook. It has a similar program called Entourage, but Entourage can’t use Outlook data files. If you want a Mac but must have Outlook, you will have to install Windows.

Q. Can I use all my Windows files on a Mac?

A. Out of the box, Macs can handle all the common file types Windows machines create, including text files, pictures, songs and Adobe PDF files. The Mac even comes with a simple word processor that can open Microsoft Word files.

However, some specialized Windows programs create files that the Mac can’t handle out of the box. And the Mac version of Quicken has a difficult time properly handling Windows Quicken files. If you are a Quicken fan, install Windows and run the Windows version.

Q. Can I mix Macs and Windows on the same home network?

A. Macs can plug and play with most brand-name wired and wireless routers, and can share Internet connections with Windows PCs.

Q. How are Macs at Web surfing?

A. Fine. Apple’s built-in Safari browser is very good and the Mac version of Firefox is essentially identical to the Windows version. However, Macs lack an up-to-date version of Microsoft’s Internet Explorer, so you will have to install Windows if you need IE.

Q. Can Macs run standard peripheral hardware?

A. Macs can run nearly all keyboards, mice and printers that use USB connections, even ones that don’t explicitly say they run on Macs.

Q. What desktops does Apple offer for consumers?

A. Apple’s main consumer desktop is the one-piece iMac, which I regard as the best consumer desktop on the market. It comes in four models, with built-in 20-inch or 24-inch, flat-panel screens at starting prices ranging from $1,199 to $2,299.

Q. How about Mac laptops?

A. There are two. The entry-level MacBook has a 13-inch screen and a starting price of $1,099. The high-end MacBook Pro comes with either a 15-inch or 17-inch screen and starts at $1,999. Apple currently doesn’t offer a smaller laptop for road warriors, but there are persistent rumors that it will do so soon.

Q. What minimum specs should I look for on a Mac?

A. All Macs come with at least one gigabyte of memory — twice the minimum required for the new version of OS X, called Leopard. If you can, get two gigabytes. Apple charges a lot for extra memory, but you can buy it for less at stores and online providers.

Macs use the same dual-core Intel processors and graphics systems as many mainstream Windows computers; and, as with Windows, I wouldn’t pay extra for greater processor speed.

The iMac comes with at least a 250-gigabyte hard disk, and Mac laptop hard disks start at 80 gigabytes. Mainstream Windows desktops typically start with larger hard disks. But Apple offers much larger disks as options, which you should consider if you store a lot of photos, music and video files.

Email me at mossberg@wsj.com. Find all my columns and videos online free at the new All Things Digital Web site, http://walt.allthingsd.com.

There are several reasons for this, including the security problems in the dominant Windows platform from Microsoft; spillover from Apple’s blistering success with its iPod music players; the fact that Macs can now run Windows programs; and Apple’s highly successful chain of company-owned retail stores.

But another key factor has been the Mac operating system, called OS X, which came out in 2001. It has proved to be as powerful and versatile for mainstream consumers as Windows, yet easier to use and more secure. And Apple has upgraded OS X far more rapidly than Microsoft Inc. has upgraded Windows, bringing out major new releases roughly every 18 months, while Microsoft struggled for more than five years to produce the latest Windows iteration, Vista, which came out in January.

On Friday evening, Apple will release yet another new version of OS X, called Leopard, to replace the current version, known as Tiger. I’ve been testing Leopard, and while it is an evolutionary, not a revolutionary, release, I believe it builds on Apple’s quality advantage over Windows. In my view, Leopard is better and faster than Vista, with a set of new features that make Macs even easier to use.

Leopard will come preinstalled on all new Macs. It can also be purchased for $129 as an upgrade to existing Macs that, depending on configuration, can be as many as six years old. Unlike Vista, which is sold in four noncorporate upgrade versions ranging from a $100 stripped-down “basic” edition to a $259 deluxe “ultimate” edition, there’s only one version of Leopard. It includes all the features, from those aimed at novices to those aimed at power users.

For me, the marquee features in Leopard are a new function called Time Machine that automatically backs up your entire computer in the background; two new methods, called Cover Flow and Quick Look, for rapidly viewing the contents of files without opening any programs; and new techniques that allow you to access the files in, and to remotely control, other computers on your network or connected over the Internet with a few clicks and no technical expertise.

Plus, Apple’s free software for running Windows on a Mac, called Boot Camp, which was formerly an add-on users had to download and install, is now built right into the operating system. And, in my tests, the third-party Fusion program for running Windows and Mac programs simultaneously continued to work fine in Leopard.

I did notice a few drawbacks, but they were minor. The menu bar is now translucent, which can make it hard to see the items it contains if your desktop picture has dark areas at the top. The new folder icons are dull and flat and less attractive than Vista’s or their predecessors on the Mac. While Time Machine can perform backups over a network, the backup destination can only be a hard disk connected to a Mac running Leopard. And, on the Web, I ran into one site where the fonts on part of the page were illegible, a problem Apple says is known and rare and that I expect it will fix.

While Apple claims the new system includes more than 300 new features, there is nothing on the list that could be considered startling or a major breakthrough. Some of Leopard’s features are unique, but many others — such as backing up data and quickly viewing files — have been available on both Windows and the Mac via third-party programs or hard-to-find geeky methods buried in the operating systems. Leopard has made them easy to find and use.

When I upgraded my personal iMac desktop to Leopard, it took less than an hour, and after the process was complete, all my programs, including the Mac version of Microsoft Office, the Firefox Web browser and Adobe Reader, worked rapidly and fine. I was still able to run Windows XP via Fusion. And my previous installation of Boot Camp, which turns the iMac into a speedy, full-fledged Vista machine after a reboot, worked perfectly. All my Vista programs and files continued to function properly.

With Cover Flow, users get a visual preview of a computer’s files without having to open programs.

In fact, every piece of software and hardware I tried on two Leopard-equipped Macs — a loaned laptop from Apple and my own upgraded iMac — worked fine, exhibiting none of the compatibility problems that continue to plague Vista. My old Hewlett-Packard inkjet printer, for which Vista lacks the proper software, worked instantly in Leopard, even over the network. And, unlike with Vista, it was able to print on both sides of the page. I popped my old Verizon cellphone modem card into the test Leopard laptop and it worked, too, with no software installation or tweaking.

Leopard felt about as fast as Tiger, and it started up much faster than Vista in my tests. I compared a MacBook Pro laptop with Leopard preinstalled to a Sony Vaio laptop with Vista preinstalled. Even though I had cleared out all of the useless trial software Sony had placed on the Vaio, it still started up painfully slowly compared with the Leopard laptop.

It took the Vista machine nearly two minutes to perform a cold start and be ready to run, including connecting to my wireless network. The Leopard laptop was up, running and connected to the network in 38 seconds. In a test of restarting the two laptops after they had been running an email program, a Web browser and a word processor, the Sony with Vista took three minutes and 29 seconds, while the Apple running Leopard took one minute and five seconds.

Here’s a rundown of some of Leopard’s key features. Much more detailed information is available at apple.com/macosx.

File management: Apple’s Finder, the equivalent of Explorer in Windows, now offers two new ways to quickly see what your files contain. You can still view them as icons or lists. But you can also use Cover Flow, the same system Apple uses in iTunes and on the iPhone to display album covers for music. In Leopard, a large preview of each file you select appears above the list of files in a folder, and you can rapidly scroll through these icons. These previews are live, and their contents can be viewed without opening the program that is normally needed to display them.

Time Machine backs up files.

For instance, if the file is a video, you can just click on it, and it will play. If it’s a multipage PDF file, you can click on it, and arrows will appear allowing you to flip through the pages.

An even better and deeper look can be obtained using a feature called Quick Look. Just hit the space bar or click on a toolbar icon, and a preview of any selected file zooms out. You can even view multiple sheets in an Excel file via Quick Look without launching Excel.

Another quick new way to see your files is available in the Dock, the Mac’s equivalent of the Windows Task Bar. Here, any folder you place on the right side of the dock will display its contents, after a single click, either as a grid of icons displaying miniversions of the file or as a “fan,” or arc, of such icons. These special Dock folders are called “Stacks.” Leopard includes one by default that is the destination for everything you download from the Internet, so your desktop will no longer get cluttered with downloads,

Time Machine: This built-in feature will continuously back up all of the contents of your Mac to either an external hard drive directly connected to the computer, or to a hard disk connected to another Mac running Leopard that’s on your network. The initial backup, in my tests, took all night, but after that, the system updates the backups hourly and I didn’t notice any slowdown during the process.

To recover any file you deleted, you simply click on the Time Machine icon, and you are taken to a view that shows file folders — or your email or address book or photo collection — in a stack of windows that appear to go on infinitely. You click on an arrow and the stack of windows zooms until you arrive at the last view in which the missing file existed. Then, you click “restore,” and the file is recovered in your normal desktop view. You can also restore whole folders, groups of files, or even an entire hard disk.

Shared computers: In Leopard, any computer that has been set to be shared on your network shows up on the left side of every Finder window. Click on it, and you can access whatever folders have been shared on those machines. Depending on the remote computer’s security settings, you may first have to enter a user name and password. It’s the simplest method I’ve ever seen for accessing other computers on a network. And it works with Windows PCs as well as Macs. When I first turned on the Leopard laptop in my office, it immediately found a shared folder on my colleague’s old Dell running Windows XP. She hadn’t even remembered sharing the folder, which contained files from 2003.

You can copy or move files to and from these shared computers, or view their contents with Cover Flow and Quick Look, or open them in programs on your own computer.

If you are a member of Apple’s optional .Mac service, which costs $100 a year, you can use a feature called “Back to My Mac,” which can access your Macs from thousands of miles away over the Internet. However, this feature works only over certain kinds of routers (not all of them Apple’s) and, as my router didn’t qualify, I couldn’t test it.

Remote control: For any Mac in your shared-computers list for which you have permission, you can take over the screen by simply clicking on a button called “Share Screen.” You can also remotely control distant Macs over the Internet using Apple’s built-in iChat instant messaging program, as long as you have permission and the Macs are running Leopard.

Stacks displays the files in folders in the dock.

iChat: Apple now allows you to use its instant messaging program with Google Talk as well as AOL’s AIM service, and you can set up a video chat in which you can present a slide show or display a document. You can also add special backgrounds that can make it look as though you’re someplace else, like Paris. In my tests, this even worked with someone on the other end using a Windows XP computer running the latest version of AIM.

Spaces: In order to cut down desktop clutter, Leopard lets you set up as many as 16 different desktops that can run simultaneously, with different programs open in each. You switch among these desktops by using keyboard commands or a menu.

For instance, you might have your iPhoto and iTunes running in one “space,” or desktop, your Web browser and email program in another, and Windows XP in another.

Leopard isn’t a must-have for current Mac owners, but it adds a lot of value. For new Mac buyers, it makes switching even more attractive.

Email me at mossberg@wsj.com. Find all my columns and videos online free at the new All Things Digital web site, http://walt.allthingsd.com.

But there’s more than one way to get a strong, fast Internet signal all over your house. You aren’t limited to using a single wireless router. You don’t have to install a bunch of complicated wireless “range extenders.” And you don’t have to snake networking cables through your walls.

Instead, there’s a simple alternative that’s often overlooked: Using small gadgets called Powerline adapters, you can route your Internet connection around your house over your regular electrical power lines, the ones already in your walls. It really works, it’s fast and it doesn’t disrupt your electrical system. Even better, it requires zero technical skill.

You just plug one of the adapters into a standard electrical outlet near the place where your Internet connection enters your home. Then, you connect the adapter to your wired or wireless router. Next, you plug a second, identical adapter into an electrical outlet in a distant room where you lack an Internet connection. Finally, you plug a computer (or even a wireless access point) into that second adapter. There’s no setup, no required software and no technicians or tools are needed.

When you plug in a computer into the second Powerline adapter, it’s as if that computer was right next to your cable or DSL modem and router. You are on the Internet at full speed. If you plug a Wi-Fi wireless access point into the second Powerline adapter, it will create a wireless network in and around the distant room, which multiple computers can use.

I first reviewed these Powerline adapters in 2003. I liked them, but they were a little slow and never took off. Now, however, one of the leading home network product makers, Netgear, offers a whole line of faster Powerline adapters.

I’ve been testing one of Netgear’s newest models, the XE104, which costs $100 per adapter, and I can heartily recommend it. It couldn’t be simpler or more effective. In my tests, the XE104 gave me wicked-fast connections. I tried plugging Windows and Macintosh laptops directly into the adapters in rooms where my wireless signal was weakest. I also tried plugging a Wi-Fi wireless access point into an XE104 adapter and picking up the connection wirelessly on the laptops. (An access point is a wireless gadget that takes a wired Internet connection and propagates it through the air.)

In all scenarios, the Netgear XE104 adapters delivered nearly the full speed of my Internet service, which in my case is very fast — 15 megabits per second downstream and two mbps upstream. In fact, the XE104 can handle speeds up to 85 mbps, far faster than any common connection.

You can use up to four Netgear adapters at once, and the company claims they will cover a 5,000-square-foot home. Netgear includes optional software to encrypt your Powerline connection, but this is needed only if you share an electrical system with other families.

Linksys, Belkin and other companies also make Powerline adapters, sometimes called bridges. But Netgear is the leader in this category, and I didn’t test the other brands.

The XE104 is a small, white rectangular gadget about 4 inches high, 3 inches wide and 1.5 inches thick. It carries a standard two-pronged electrical plug and mounts right into the wall outlet.

On the side, there are four standard Ethernet network ports, like the kind on your router and laptop. Netgear includes a short Ethernet cable so you can connect the first adapter to your router and the second one to a PC or a wireless access point.

The four Ethernet ports are what make the XE104 a “switch.” They allow you to connect each adapter to multiple devices. For instance, the first adapter can be connected both to your router and to a PC. The second might be connected to a PC, a wireless access point and a device like a game console.

Netgear makes a similar model without the multiple Ethernet ports, called the XE103, for $80. There’s also a costlier model that goes up to 200 mbps, though that’s overkill for 99% of people.

The company also makes a Powerline adapter with a built-in wireless access point for the distant room, the $150 WGXB102 model. This saves you the cost and hassle of buying and connecting a separate access point. But it’s slower and uses older technology. In my tests, it was less than half as fast as using the XE104 with a separate, modern wireless access point.

Unfortunately, like a lot of network-equipment makers, Netgear is clueless about naming products so that normal humans can understand what they are. The XE104 is officially called the XE104 85 Mbps Wall-Plugged Ethernet Switch. That’s like calling a table lamp the LS482 75 Watt Wall-Plugged Switched Illumination Device.

Netgear even makes it hard to find the XE104 on its Web site, netgear.com. It lists it under a section called “Bridges, Access Points, and Range Extenders.” You can buy them at computer stores and other retail outlets.

These adapters are a terrific way to clear up Internet dead spots.

• Email me at mossberg@wsj.com.

Lots of new technologies claim to be transformative, productivity-enhancing and liberating. But only a few really live up to those claims. One of them is Wi-Fi, the wireless networking technology that has truly revolutionized the way people use the Internet.

With Wi-Fi, you can get online in any room of a home or office — not just the room where your wired Internet connection lives. And you can use the Internet in airports, coffee shops, hotel lobbies and lots of other places where it wasn’t possible before.

But like a lot of technologies, Wi-Fi has been changing so fast that confusion has crept in. A new version of Wi-Fi, generally known as draft-N, promises greater speed, greater range and standardization, but may not deliver any of those things. I’ve been testing some of this latest Wi-Fi gear, with mixed results.

Linksys draft-N router

Also like some other technologies, Wi-Fi adheres to standards set by a private engineering organization called the IEEE (Institute of Electrical and Electronics Engineers), in which representatives of interested companies participate.

The current version of Wi-Fi blessed by the IEEE is called G and has a maximum speed of 54 megabits per second. This G version of Wi-Fi, known to techies as 802.11g, is built into most wireless routers (which transmit and receive Wi-Fi signals) and most laptops.

Now, the IEEE is working on a new, faster standard called N. It promises much greater speeds, measured in the hundreds of megabits per second, and much better range. But certifying this N standard is taking forever, partly because of factionalism within the IEEE.

In the meantime, the marketplace has moved on. Last year, major makers of Wi-Fi routers, like Linksys and Belkin, brought out routers that used a major advance, called MIMO, expected to be in the eventual N standard. This technology uses multiple antennas to send and combine multiple data streams into one faster, longer-range signal.

Last year, I endorsed one of these MIMO products, Belkin’s Pre-N router, which was the only Wi-Fi router I ever tested that covered every corner of my home at decent speeds, even when I used laptops with only the older G technology built in.

Now, the Wi-Fi market has moved again. The major makers have all brought out what they call draft-N routers and cards for laptops that adhere to a draft of the coming N standard that the IEEE has passed. It’s probable, but not certain, that the final N standard likely to emerge next year will comply with this draft. Similar draft-N gear will be built into new laptops later this year.

The makers are claiming that the draft-N routers will have up to 12 times the speed and four times the range of G equipment when used with compatible laptop cards. Even if you are just using a laptop with a G receiver built in, the new routers can also improve speed and range, though more modestly.

Speed is nice, but even current G maximum speeds far exceed the speed of most home DSL or cable modem connections. What’s more important to most consumers is range, or more accurately, decent speed at longer ranges. The biggest Wi-Fi problem people face is dead spots or very slow connections in parts of their homes.

I tested the new Belkin draft-N router, called the Belkin N1, in my house and compared it with the Belkin Pre-N router I bought last year and have used ever since. The new router, which I placed in exactly the same spot as the old one, was easy to set up. It has lovely, large icons on the front that tell you if everything on your network is connected and working.

But the N1 didn’t perform any better, and in some cases did worse, than the old Belkin. This was true whether I was testing it on a Windows laptop or a Mac laptop, and whether I was using the Belkin N1 laptop card or just the built-in G radios in my test laptops. The new model covered my whole house, but so did the old one.

I also tried the Linksys draft-N router, called the WRT300N, which has an antenna array that makes it look like a radar station or a submarine conning tower. The company had to help me set it up, because I use a very fast Internet service called Verizon FIOS, which the router’s program doesn’t recognize. The Linksys proved much slower than the Belkin, though this may be because of a mismatch between its settings and my Verizon service, which is used by only a few hundred thousand homes in the U.S.

My unimpressive draft-N experience is confirmed by several, more extensive tests done by some magazines and Web sites, which showed the draft-N gear to be no big deal.

There are two other problems with the draft-N systems. The manufacturers aren’t promising to upgrade them to the final N standard when it emerges. And buying them will get more complicated in the coming months, because they will be offered in a range of speeds and even in two different frequencies.

I can’t recommend the draft-N equipment over the previous round of MIMO-equipped routers. They will likely be better than your G equipment, but so were last year’s models.

• Email me at mossberg@wsj.com.

Corrections & Amplifications:

A new, faster standard for Wi-Fi wireless network connections promises speeds measured in the hundreds of megabits per second. This column incorrectly says the new speeds would be in the hundreds of megabytes per second.