I've been using Windows 7 for about 6 months on four laptops and two desktops. I absolutely love it, and I hate Vista with a passion. It installs easier and quicker. It dual-boots very easily, so you can keep whatever you currently run right along side it in case you run into any driver issues. I haven't had any driver problems myself. Oh yeah, it's way faster than Vista too.
Here's the craziest part: I installed it on an old Dell C400 (1.2 GHz CPU, 512MB RAM) and it actually works. No problems at all. Crazy, right? I'm a big XP fan, but I'm really impressed with Windows 7, and it's still new.
PS: I'm not a M$ salesman or stock-holder.