Compared to past HP movies, this one is the best. No contest. If you've read the book, it's about 90% accurate, with some changing of sequence and dialogue and leaving things out of course. Not very much adding random things that didn't happen. Even so, it's a wonderful movie and fits the storyline that's been built through the years in movie form. Not for small kids, very frightening at certain points, even if you're expecting it. The Harry-Hermione relationship is emphasized way too much, my only complaint. Beautiful scenes, much improved acting, effects that seem real, absolutely great movie.