It seems like they were trying to tell a couple of different stories here. There's the whole kidnapping thing and then the Native American mythology angle and the hallucinations. I feel like they were trying to communicate something deep and profound, but it seriously misses the mark.
The cinematography is beautiful and the score is appropriate, the acting is very good. But so much of nothing happens for the first two-thirds of the film as the protagonist searches for his sister. The ending feels like it should be deeply meaningful, but it's just kinda "meh".
Not a bad movie for a rainy afternoon if can't decide between a movie and a nap, but you're leaning towards the nap.