I think w7 is great. I have ever had windows from 3.1 on, and was on nt and xp for years due to work. Pairing of w7 and office 2010 is great. I don't have to fix issues on daily, but i have never had those problems. For the most part if you take care of the gear it will take care of you. I have used leopard and w7 and personally i prefer w7, but that is just my opinion.
Really, what's yours?
