For those who like action this is the movie for you. However, for those who have read all 4 books, in an effort to achieve the action much of the dialogue has been condensed. While the focus of the movie is the Edward, Bella, Jacob triangle, the tug of war that occurs within Bella herself to try and reconcile the two parts of herself, Jacobs Bella and Edwards Bella, is lost. For those who have never read the books, the movie will seem congruent with the last 2 and thus is very much worth seeing.
Overall the movie is worth seeing. I agree with previous reviewers that it is helpful to read the book prior to seeing the movie. The director took some license with the book. The central characters outside of Bella and Edward were not nearly developed enough. Alice and Jasper are very central to all the stories and yet you learn very little about these two outside the fact that they are part of the Cullen family. In addition, we do not learn anything about Carlyle's past, this too will be important if there are sequels to this movie in store. I realize that this would have lengthened the movie, but fans would gladly sit through an additional 30 to 45 minutes if that is what it takes to keep the movie true to these wonderful books.