I enjoyed this when it first came out. Slow but beautifully shot SF / horror, worth a watch for sure. A few years later I read the book, which is extremely different. The novel is excellent and would have made a much better film. Unfortunately it would have been too graphic to do any justice to. I think that may explain the director’s more minimal / artsy approach. If you liked the movie, DEFINITELY read the book. I would not recommend the reverse situation.