I don't think I've been as exhilarated by a movie in years than I was during this. The sequences of destruction sent my pulse right up and my stomach in knots. Gravity may be one of the scariest movies I've seen as well. There are so many moments of pure dread and suspense and it manages to reuse the same basic setup three full times and each time ends up being just as affective as the last. There's one moment in particular that I loved:
spoiler (click to show/hide)
She's trying to detach the parachute from the Russian escape pod. She looks behind her and doesn't see any debris. As she continues to work, in the distance, you see objects dart by out of focus.
That moment worked as well as it did because of the 3D and that to me shows how damned brilliant the director is. The 3D in this movie was fantastic and improved the movie without a doubt.
Going in I was down on the idea of Bullock being the main character. To my surprise she held her own. I was impressed that she's been able to turn her career around since the Oscar win. I hope she continues to pick quality projects.
I pretty much loved it. It's not perfect but the experience was amazing.