First, my completely biased opinion: one of the most amazing, thought-provoking, well-filmed and fascinating movies that I have ever seen. I immediately wanted to go back into the theater and watch it again. The plot is so detailed and unique. I really enjoyed it. I highly recommend it to the older teen/adult who enjoys that sort of mysterious science-fiction.
I really don't want to spoil the plot, so unless you're unsure about seeing it and want to know the gory details of all the negatives in the plot, don't read any farther. The first negative is the amount of violence. Much of it is in dreams, so the "people" being "killed" are actually just projections of the dreamers subconscious, and not actually "real" people being killed. It still looks like real violence, though. Second, God's name is abused, and there are several other curse words, but it wasn't the worst language that I remember for a PG-13 movie. Third, there aren't really any good guys, as the main characters are thieves, trespassing in and stealing from people's minds. The main issue for me, though, was the suicide aspect. In dreams, suicide "wakes you up." One character, having experienced the effect of suicide in a dream, comes to believe that real life is still a dream, and to really wake up and see their "real" children, decides to commit suicide again, and tries to convince the spouse to do the same. The character succeeds in suicide, but the spouse doesn't try and tries to save the other character unsuccessfully. As you can imagine, that is tragic. Also, the effect that this movie might have on people of suicidal tendencies or just people in general who might not have a Christian viewpoint on life, death and the afterlife is worrying. However, all that aside, I would still recommend this movie to anyone sane who wouldn't have an issue with the violence and language. It was pretty clean for a PG-13 movie, but I don't recommend it for children under 13 at all.
