The movie is very slow, and is all the better for it, do not expect fast paced action and buckets of blood in this one! The start of the movie reminded me of a Lynch film as the dialogue and actions of the characters is slow and methodical, the whole film has a Lynch like feel to it and moves along as if we are getting nowhere, even the climax of the film is no Hollywood wham bam explosive type ending. The characters in the film all pretty much have something to do with the plot, there are very few incidental characters and the acting whilst a little wooden at times, keeps well in time with the pace of the movie, especially good as it is a cast of unknowns. Clearly influenced by some of the more creepy Japanese horrors that have come out in recent years, this relies heavily on chills and fear to give it it's edge, I was honestly shocked to see such a film coming from America. Throughout the film I was genuinely spooked and on edge, no particular jump out of your seat moments but the atmosphere of the movie keeps you unnerved throughout.
I highly recommend this if you don't mind your films slow and steady, do not expect the pace to pick up to Hollywood action speed at any point, this is a movie about atmosphere and emotion. A good American film for those who prefer the chills of Japanese horror movies and are looking for something a little more then blood and guts.