Depends on your RAID controller. nvidia raid still isn’t working right. You need to slipstream the drivers yourself. It’s kind of a pain in the ass. Should be ok otherwise. RC1 is WAAAAY better than previous builds. It really shows that at least SOMEONE at m$ is trying to make a quality product. The new Aero theme is nifty but you better have at LEAST 1GB of ram for this thing. It’s hungry.
I wouldn’t really recommend it as a sole OS at this point. You could, but not everything is compatible at this point. Using it on a separate partition is ok though.
Also, I’ve been hearing that the x64 version is a HUGE pain in the ass because of the drivers. I haven’t tried it yet though, I’m still using x86.