I enjoyed the books. To me they seemed fresh in plot and conception. They were a lot more grim than any other YA I can think of at the time. Very intense.
What the movie will be like, who knows—the screenwriters may have brought in influences from other, older writers—or newer writers for that matter—as well as their own notions of how to "improve" the original, and thereby strayed from the books a lot. Who can say? Trailers can be so deceptive, so can producers when promoting their movies. Guess we'll have to wait until the movie comes out and read some reviews.
For now, going by the trailer it looks like the acting will be less than stellar, but at least the visuals look like they'll be interesting.