This is the first time I've reviewed a product I've bought from Play, but I was so impressed by this that I felt compelled to.
I bought this to replace my aging D-Link USB adaptor, which was struggling to hold a signal in my new flat. The Edimax unit has blown it out of the water, as I'm now getting a strong, fast signal which hasn't dropped once.
It was very easy to install - literally 2 minutes, no problems with Vista, and I was online. The range of the unit is very impressive, too as it's picking up several networks that my D-Link couldn't even see.
The unit itself is very small and well-designed, and is a quite pleasing white colour. The aerial section can be rotated through 180 degrees to obtain the best signal, and the USB cradle has a sticker on the bottom so you can attach it to your desk/a wall if you want to. Mine is sitting happily on my desk without using the sticker though! If you don't want the unit visible, you can simply plug the aerial section into a USB port at the back of your computer.
The only negative thing about the product is that it comes in one of those annoying plastic packages that you need to take the scissors to in order to get it out. It's a minor frustration though!
I was very impressed overall with the Edimax. The performance is fantastic for such a low price. Don't bother with more well-known brands like Belkin, which are inferior - this is the one to go for.