I never upgrade operating systems. Most older computers can only run Vista Basic because either memory or graphics card are inadequate to do more.

If I had a Vista ready computer and no issues, I'd stay with XP. Otherwise I might try to reformat and start over if Vista allows that. pgrading seems to be asking for trouble.

In any event, I'd wait at least 30 days and see what happens to people who try. It is going to be interesting.

I have an almost 4 year old computer. I will likely replace it in a month or or two assuming early Vista users are on the whole happy.