The premise is intriguing and to begin with I found it fascinating watching the intruder moving about the house with supposedly great confidence and the family's inability to notice his presence. There are certain scenes - during the dinner party, and later when hangman emerges from under the bed after the husband has just left the room, that come across as genuinely shocking regarding the intruder's audacity. However, as the film progresses I find it less and less believeable. Any "normal" - and I use the word advisedly - male intruder of that age woul've shown more interest in the teenage daughter, or if not that then the wife, although we never get to see the ultimate result of his antics with her after he carries her upstairs intoxicated. The ultimate problem with this film is the ridiculous way in which the family meet their end. If hangman was as truly deranged as his character was depicted then he would have either given away his presence long before the end of the film or else they would have deduced that there was an intruder camped out in their loft. Not convincing enough, I'm afraid...