I like it. I hope they smooth out the animation for the 9400m though.
For me it contains a couple of ui dead ends.
-cant see minimzed apps (its supposed to be a one stop place to find all your windows)
-cant transfer windows from one space to another within Mission Control without first going to that space,activating MC and then moving it.
Picture for clarity:
IMHO if OSX didn't allow users to minimize windows to the apps dock icon (i.e. only minimizing to the right of the Dock) there'd be no problem since the Dock is always shown in MC.
It's an option and I'm definitely going to do that. I don't have too many apps in my dock so I have some room to spare for minimized windows.