Yeah, and I agree with that... but that's true for any book adaptation. The problem is, the book is very VERY basic (assuming the fault of the translation). There aren't many descriptive details, its just very "Jane went here. Jane saw this."
Don't get me wrong the book is great, but the movie is one of the best vampire movies ever made.
The use of space, the way there is no musical score, the pacing, everything is so well done.