I haven't seen the film of The Girl With the Dragon Tattoo yet - not sure if I want to. I often find films of novels I've read disappoint me. I'm two-thirds of the way through the series. The first was better than the second, and the third is supposed to be as good as the first, but I've been putting it off until I've got plenty of time to devote to it. They are gripping, fast paced and excellent. Thoroughly recommend.
The film was meh. The books were amazing. Sooo good. If you've seen the film you know the character lisbeth. In the book, you really get in to her mind and how she thinks. She's very unusual and they really didn't touch on it in the films.