Me? I haven't had any problems with Win8 at all. It's working great. I just hate using it. It's like Pro Tools for me. Good program, but there's a major cultural conflict so I won't use it. It's Sonar all the way for me
I don't like that charms thing and all that stuff that keep popping out everywhere, all the weird clicking, and the interaction with the OS just isn't to my liking. I tried a touch mouse thingy to see if it helped with my experience of using Windows 8, but not only is it a really lousy mouse, I don't think it enhances the Windows 8 experience at all.
I just purchased a MacBook and really dig it now and will use that on the stage with Ableton Live. And for my personal computing, I just can't stand the dual OS attempt they are currently running. My main DAW will remain Windows but I'll probably go back to Win7 on it because I don't like interacting with Windows 8 at all. However, I'm curious to see what Win8.1 will do to it all. Fingers crossed it will suit me as well as Windows always has.
Besides that, Windows 8 is working really well on my system