It was good all the way up until they were all at the cabin trying to kill each other. From that point on it was kind of predictable and lacking something. Before I saw the movie I had the impression that they were going to be rounded up by the father and tortured. I imagined that he was going to capture them, maybe tie them all up and do some serious damage (being a doctor and all). But as it turned out he just fought/killed them all. Which was better than nothing I guess. I was satisfied with the movie, but I thought it could have been a little better.