I loved this film. I have written about it elsewhere (at length) but I thought it was much maligned and oddly enough by men not women. Men hate it. I got slightly addicted to the cellar and the raping and so on, because it reminded me of my life in not quite so literal terms. I loathe the girl who everyone likes, JoAnn, and I like the upperworld/underworld dichotomy and Noah. Subversive.
People overlook that the titular dead girl is a jumping off point for the teen-aged characters. Overall it's a pretty grim and true reflection of the general attitude that our society has towards sex. But then again people tend to take horror movies on the surface only if it isn't "old" or "widely acclaimed".