I think it got into my head that I should watch this because of an intriguing review that I read while it was cinemas, which used the old 'don't know too much about this film before you watch it' hook. Well, it's good, but gods is it grim - tense and claustrophobic, to the extent that it feels like a horror film at times, and brutal too. Well made, strong cast in excellent form, and it did keep me watching to the end - but if I'd known what it was going to be, I probably would've avoided this one.
