Vista? Oh, Mojave!, no....now Windows 7? I’m still using XP, am I a heretic?
I installed it on an unused partition. I like it so far. I think it will be a good successor to XP in a few years when hardware catches up. The new Taskmanager is nice, sorta like Sys Internals' Process Explorer. It has some User features which appear similar to Linux and Mac -go figure, but with much higher resource requirements than Linux.
As for now I'll stick with the performance I get from XP SP2 on an DFI DK X48-T2RS Plus mobo and a 45nm Intel Wolfdale, E0 @ 4.979Ghz rather than the lower performance I'd get on the same rig with Windows 7.