I can’t say much that hasn't already been said a million times about this one. I looooove characters who are royally fucked up, and there are lots of them in this book. I definitely didn't see the ending coming -- I knew something devious was brewing, but I couldn't have predicted something THAT nuts.
I did see the movie as well, and I really didn’t like it. You still got the gist of the story, but the movie left out a LOT of the insanely screwed-up things the characters did. Where the book had me saying, “Omg, these are the most insane people in the world, can people like this really exist, wtf, ” the movie had me going, “Eh, they’re a little crazy.”