Seriously the best movie I've seen in years. I went in with high hopes and high expectations, and it completely blew them out of the water. I'm still thinking about it and unpacking it, and I probably will be for a very long time.
(To anyone who was thinking about seeing it but doesn't like gore, there are only a couple of moments of violence and two or three slight nosebleeds. I've seen worse on tv. The horror in this movie is pretty much all situational and psychological. We're talking Hitchcock horror here.)