This is a movie for mature audiences, viewers that like the subtalty over the blatant. The dialog is clever, a bit flat sometimes due to the lack of a score, but sometimes this ads to the movie in particular places. Jeff G. is excellent in this role (and I am not one of his fan). And to those that complain that the end of the movie is not climactic enough I don't know why because it is just perfect, just with one line. Rent this movie. It will scare you without grossing you out.