DH and I saw this today. The 3-D version. Tip-top. I've liked Sandra Bullock since the fabulous "Demolition Man", and she's excellent here. As is Mr Clooney.
The CGI/SFX are gobsmacking, but don't overwhelm the action: I was biting my nails so much, and it's only a 90 minute film.
Not to spoil, but I would have ended the film at a different part of the action.