I've been using Windows 7 for ages now. Had to do the RC reinstall. Kinda pissed me off, but well worth it. I have kind of been calling it, Vista Enhanced. That's basically all it is. I don't see SO many changes that it's worth buying it as a full price OS when it's just an UPGRADE to Vista... but it's got a lot of useability enhancements I love. I like dragging windows to half screen with one click? Love that. Maximizing by dragging window to top/bottom of screen? Nice feature. Also, open a ton of windows, the grab one and shake your mouse! haha