Win 7 is not bad. I won't be going back to Windows as my primary OS - too many security issues and I just plain like Ubuntu. But on the same hardware Win 7 boots in about the same time as Ubuntu (10.04). For the once or twice a month I have to use Windows at home, 7 is hard to beat.
I’ve been using Linux for about 10 years. For the past couple years Fedora, specifically.
It does everything I want to do with my computer. And it does many things that I simply cannot do with Windows.
I do run a couple Windows-only programs using WINE (Let’s you run some Windows programs on other operating systems like Linux). It just works and is very stable for me.
I have not purchased Windows since I last bought Windows 98. I have used it plenty though (seven years as a software QA engineer and 1 year as a PC repair technician). Nearly every time I interface with Windows, I come away frustrated by the experience.