I'm usually not a fan of psychopath/serial killer movies. I mean, they are most of the time entertaining but they are never great, in my point of view. This one is the exception. It is so thoughtful and complex. I saw it again not so long ago and once again, it completely blew my mind. One thing I found really striking is that they stripped down most of the tricks used in most of your typical horror/thriller flicks. For example, there is no background music during the whole thing and, usually, in all Hollywood flicks, the music is literally shouting at you when something scary is going to happen. Not here, here you have to make up your own mind about what it is scary or not. There is actually not much actual violence but it must be one of the most violent movie on a psychological level I have seen. So, I must say it is a rather heavy and depressing movie to watch and many people won't enjoy it for a bit. Personally, I think it is an amazing picture, one of my favorite, and it is definitely worth a look.