It's hard to describe how thrilled I am to actually find a WiFi adapter that actually works. You just plug it in, and it works. I've never experienced that before. Funny enough, it gets decent speeds even without the antenna attached, if you're really tight on space.
20 feet from the router in the same room, I get: Download: 250mbps Upload: 330mbps
Different PC, about 20 feet from the router and through two walls, I get about 100mbps up and down.
That doesn't compete with wired ethernet, but this doesn't require running a wire through your house. If I ever need another wifi adapter for a different PC, I will get one of these.