I have to say it's rather nice. Although at the same time, odd. I do love the glassy windows, but then when you maximise something they vanish and go black

The account protection thing (something i've noticed using my mate's crapintosh) is probably a good thing, although slightly overzealous at the moment (surely Windows Firewall / security centre etc should be exempt?)
Also a lot of programs decide to crash for no reason

What i might do (taking into account my current setup involves a partitioned drive) is reinstall it again, but clean. Then see how that goes before deciding whether to go back to XP for the moment.
Has anyone else tried it? I did give it a shot in vmware prior to installing it for real, but it's simply too slow in there.