Still trying to resolve my initial reactions to seeing the trailers and what I saw in the full length version. Two very different experiences. The violence--I use that term loosely because it's such a charged word--expressed through real human loneliness, sadness and anger was surprising. I can see why some may say it's not a kid's movie. The anger is truly frightening especially coming from creatures who are so lifelike. The special fx was incredible and seamless when it came to the creatures. Really brilliant.