I saw the film last night. Ang Lee does a very decent job using technology to bring that novel to the screen (the story drives the computer animation, rather than the other way around). The cinematography is outstanding. My criticism is it is hard to fit that novel into a two hour movie. I do not want to give it away if you haven't read the book, but in the movie's the first half never fully reconciles with the second half. But if you liked the novel, go see the film.
Open Blogger at AoSHQ has a post on the film. The film did not sway me that way, but he has a point.