Well its entirely too early to tell anything, but as i came to this site in Vista using IE7 heres my initial impression:
Nice layout in general. The differences from the old windows o/s is suprisingly not very cumbersome.
Speed suffers occasionally, by alot.
IE7 is definitly a FF rip off.
GUI couldnt me more MAC OSX if it WAS a mac....
User prompts are more annoying that the president bush game popup ads
Install took entirely too long
theres alot i like about it already, too. The network auto detected, installed, and configured in a matter of seconds. I havent needed to install any drivers yet, and everrything is working as it should be. O/S loaded very fast compared to my XP install.
off to play, woot!!