Don't read the bad comments. They were done by people who could not create a story as good as this, so they had to say bad things about it.
The movie itself was good. The story was great and a real eye-opener. There's always more to the truth than what one can see, and even that is clouded by people's prejudice, which is profoundly shown by this film. The fact that the huge names as Bullock did this movie should be proof enough that it's worth the watch.