I purchased this Linksys N adapter to replace a historic Microsoft MN-510 802.11b adapter on one Windows XP desktop computer to take advantage of a new Linkys WRT400N router on my home network.
The adapter works flawlessly, allowing me to connect to either the mixed 2.4GHz or pure-N 5GHz radio on the WRT400N. Signal strength, as expected, is better over distance for the 2.4GHz band. But it's still good for 5GHz. At 30+ feet on the same floor with two walls in between, the 5GHz radio routinely showing a connection at 160-240Mbps (although at 2.4GHz at the same distance, it's routinely at 270-300Mbps).
The desktop stand for the USB-form factor adapter is solid and appreciated, as it makes it easy to position the adapter for a desktop computer. The stand and adapter are glossy black, with a blinking blue light showing operation.
The major flakiness (and what cost this adapter a star) is the installation wizard software.
I removed the old wireless adapter and followed the Linksys adapter instructions as written. When it came to confirming that the adapter was installed correctly, the installation software displayed an error message saying it may not be. I hit Retry (as the wizard suggested), and after a couple of minutes got the same message. However, the Wireless Network Connection icon in Windows XP showed a working connection throughout. I exited the so-called "wizard" and finished configuration manually with no problems.
But it appears Linksys simply can't do decent installation software. I had similar problems with the WRT400N router install, which I also had to complete manually. I have to wonder if the Linksys software only assumes a new install without previous wireless equipment and a network, and fails when it finds any existing wireless network that's being upgraded.
(One tip, by the way, that applies to Windows XP: If you get an error when connecting stating, "Windows was unable to find a certificate to log you onto the network," you'll need to go into the Properties for that particular wireless network connection in Windows and uncheck the box "Enable IEEE 802.1x authentication for this network.")
All in all, a good piece of N adapter hardware with flexible 5GHz and 2.4GHz operation. A poor piece of installation software that should be avoided. Either use the CD, as others have suggested, just to install the needed drivers when prompted after plugging in the adapter, or try the installation software and be prepared to complete the configuration manually if you have problems.