Awesome enough, even for Legomancer!
So incredibly tense, awesome and beautiful, it would be an absolute catastrophe to miss it on the big screen, and I mean the big one. I saw it in IMAX 3D (20 bucks?!) and it was worth it (and I hates me some 3D usually). I was extremely tense in some scenes and a blubbering fool in others (once you have a kid, you can't even entertain a scene where someone is talking about losing a kid, it's brutal and removes you from the movie immediately). All of my science and math geek friends had bones to pick but for once I'm glad that my suspension of disbelief was uninterrupted for almost the entire film.
Both Bullock and Clooney are great (and I had great reservations about both going in). The movie is an instant masterpiece in my mind because it completely pulls a Total Recall or Avatar in becoming the new special effects standard that others will hopefully aspire to. Enough to make this stargazer not want to be an astronaut for the first time since he was a boy.
The director and cinematographer are both geniuses as I'm still recovering from seeing it hours ago. Please see it, see it on as big as screen as you can. It is a unique experience and we won't see another one like it for a long time or ever.