As a Mac guy, you dont want my comment on Windows , XP was ok , Vista -we wont go there , BUT W7 is at least worth using
they have got it work fast and i have on 3 pc's all 64bit from a 6y old AMD 2800+ to a extreme work machine. NEVR had a problem with it
it is rock solid even from the beta and rc1 . I would be even happy to pay for a copy when it comes out.;
MS really got this right, and all my hardware works bar an old Canon scanner (there where never 64 bit drivers for it)