Ignore the reviews that give Gravity 1 star and ignore the ones who give it 10! It's a damn good ride for 90 minutes. Anyone who thinks a sci-fi film has to be believable or closer to reality shouldn't be reviewing it. It's not the greatest film ever made, but if you give in to the fantasy, you'll be on the edge of your seat. A lot. If you go in as a film critic you'll come out disappointed. Sandra Bullock went up in my estimation after this and although I'm not a fan of CGI, the visual experience is immense (I reckon CGI should be a last resort when you can't use other methods, not used for everything for the duration like revenge of the sith). Apollo 13 was a better story (given it was real!) but it got dull and you can't say that about Gravity