I have to agree with most of the reviewers on here, this movie didn't deliver at all. I had high expectations, was hoping for a decent sci-fi movie but instead I got a quite boring drama. I wouldn't say the actors were bad, far from that, Natalie Portman and the rest did their job, but the story was just weak, certainly for the first half of the movie. The movie was also much too long, certainly for the story they wanted to tell. I wouldn't waste too much time on this one if I were you.