Summary: This is a great product, value and economy in a small package. I've used the product on an old laptop and desktop with Windows XP both of whose onboard wireless adapters stopped functioning. This was the quick and easy fix, no searching for how to do this or that, correct this or that, which many of us have done with frustration. Plug and play mostly but used the cd that came with it as per the instructions.
Summary: It is great that it is so small and it doesn't protrude from my desktop. Setup was a breeze. Just note that when you first install it, if you haven't ran the software that is included with this... Windows will not be able to install this hardware. However, just close out that message and proceed to install the software and you will be good to go. It is a mini-CD ROM disc, so keep that in mind if your disc tray for your computer is perpendicular to your desk/floor.
Summary: I followed the directions to install it, but it still wouldn't work. Before I returned it, I called the Tech Support line on the card that was in the box. They walked me through a dozen or more steps to get it installed correctly and now it works great. So, if you don't mind calling them for assistance, it is a great product, especially for the price.