This game is awesome! I only planned on playing the first couple missions and just kept going for hours. The learning curve was practically non-existent,(in a good way, because the game expects you to practically master it immediately). By the second mission I already felt completely comfortable flying through the air, and it looks and feels incredible.
I mean, other than the framerate, everything is alllllllll good. I can also look past it a bit, because it only gets really hairy when there's lots of environmental destruction going on, and I think that's a worthy tradeoff for a game that pushes spectacle like this one.