The main thing wrong with this movie is its casting. It's unbelievable that a pretty, young, naive woman like the actress in the leading role would fall for such an ugly, rough and brutish man like the male lead. He is so clearly deranged, that even if he acted like a total gentleman prior to their weekend trip, his craziness would show through to even the most naive, young person. Casting aside, the family dynamic and antics are rooted so far from reality that is hard to find this scary or intense. Unless the horror is supernatural, there's got to be some kind of grounding in common sense and reality for it to be scary. That is not the case here, so there's no connection or empathy or sympathy for the characters. You're just left feeling pissed that the writer/director is getting his work produced when there are really talented people out there who can't.