My brother was going on about this film recently saying how bloody good it was.

I'm not really a Sci-Fi man but i think i will check this out nonetheless.

Its a real marmite movie. When I watched it I was actually asking myself if I'd just watched the best movie I'd ever seen or the worst movie I'd ever seen. I genuinely wasn't sure. It's incredibly well acted and the plot is really layered and complex but it's possibly too complex for it's own good and it moves at a snails pace. There is no threat as such either other than man's extinction which never really feels real or impending. It's science fiction trying really hard to be science fact. Not sure if it works as a movie. Two sittings would be my advice.