My update went painlessly. It warns you it will take 20mins, but mine took probably just over 5mins. I'm impressed how nice and user friendly the update wizard was, I wouldn't have a worry that my mom could get through it (baring any driver problems, I didn't have any at all on Win7 32bit).
I'll check in after I get a chance to play with it some more
EDIT:
@MrBig: Uhh... I took 'eject' to mean unplug.