I just upgraded my wife's Vista laptop to Windows 8 because I got it cheap with a "New PC deal". (Long Story)
I really don't know what to think of it - But I do know that if I had seen a "working" pc with win8 and played with it before I upgraded, I don't think I would have bothered.
Some of it is a real pain - - - So if you are thinking about it - Test first, and don't buy later.