I have a 15" 2010 mbp and i use osx and win 7 about 50/50. In win 7, it gets pretty hot easily and i get about 2.5 hrs of battery life taking notes. In OSX, I get about 5 hrs of battery life at and it stays cool. This is most likely due to better drivers in OSX and the fact that, in windows, both the discrete video card and the integrated video card are on all the time. Also, you can do scrolling in win 7 with the touchpad, but none of the cool multitouch gestures like in OSX. Finally, you have to control the backlit keyboard manually in win 7. Besides that, though, it runs fine.