I haven't seen this movie, but honestly I just felt scared because of the title, I have this kind of phobia when it comes to watching films with oceans, sea, lakes, any kind of water involved (except for finding Nemo of course). I don't find exorcisms or creepy dolls scary, but I can't watch movies about ships, sharks, crocodiles or something like that, don't know if this happens only to me. Now that I have read your review and I've seen that this movie is on the top of the oscars nominations, I'll give it a shot, thanks :)