It's still so very young. I've already had a ton of problems but overall the experience been satisfactory even with them. The Zune app sucks a lot, though. For example compilations are artist seperated and not full folders in the music synch. I don't know what the hell they're thinking with it. Also it's a little messy at first with the whole windows live stuff, but so far it's what I've expected.
We'll see -- I've only used it 3 hours.