I don't have much to write about this great product except to say that it works 110% to the good, has no obvious faults or problems, achieves close to 300Mb/s speed without tweaking, fiddling around, or special configuration, and overall is not to be feared as a PCI-Express network adapter. I was using its PCI equivalent, the DWA-552 "N" Adapter for almost 2 months with similar success, and was forced to start using the PCI-Express variety because I started using twin EVGA GTX-285 video cards in the PC, and lost the PCI slot in the process. This is an install it, and forget it system, and works 100% seamlessly with any Vista 64-bit system. I've never booted the computer and not had wifi-it just simply works every time, without fail, no questions asked!
There's a green activity light on the back of the device that blinks off, and on whenever the signal is being accessed, which is 100% of the time, so it's blinking a lot but it's not annoying at all. The three "antenna" that stick out the back of the unit are flexible and can point up at a 45-degree angle to acquire the signal better. The adapter is small, only weighs a few grams, certainly less than 4-ounces or so, and takes up very little space in the PCI cavity of the computer, a plus.
I just used the drivers off the original CD ROM, never even bothered with the D-Link web site and the "latest drivers" which I guess should be done at some point, but I'm having zero problems with the adapter so I've been reluctant to test fate and change a thing at this point.
That's about it for my review of this product. It works, it's simple to work with, install, there is no maintenance or trickery needed to get it functioning 100% with a Vista 64-bit system, so I recommend it highly and give it my 5-Stars Seal of Approval: ***** !
Wavey Davey 7-26-2009