I now run Ubuntu 12.10, but installed Cinnamon instead of Unity. I recommend it. It installs incredibly smoothly and runs side-by-side with the other desktop environments you can select on "login" screen. Absolutely complementary: you don't have to reinstall or change anything.

I guess I am old fashioned. The Unity innovations just don't seem to appeal to me. I also run Windows 7 and I guess I will stay with it until the end of the road. I will not upgrade, not unless Microsoft comes up with something that essentially is still Windows 7, but with the eventual kernel/system improvements. Otherwise - only Linux the way forward.