anamme on 16 December 2013
If I remember correctly from the book (not to keep harping on about the book, because I understand that they are two different animals), the body count really piles up and the murders reach such a frenzy that your lefting questioning Bateman's sanity. Not so much whether he actually did them or not.
I don't think it takes away from the movie, because it's not stated explicitly anywhere that it was all in his imagination.
