If enough people say it, then it "must be true", even if the people are saying it because other people said it.
UAC took 2 seconds to disable. Done.
The UI was barely different than XP except for more polish, and you could use a more "classic theme" for the people that just don't like change...
Anyway, my experience was good, very good in fact, but I know how to build and maintain a PC, and I don't listen to what other people say without trying it for myself. ;-)