The movie was great, I love the IMAX experience even though I got stuck at the bottom (I was only 1.5 hours early opening night). I felt that the movie really stuck to the book, there were so many scenes that are almost exactly how Rowling wrote. Granted some parts of the book were meshed together in one scene, I was very satisfied at the amount of detail in the movie. I couldn't tell where the movie was going to stop, and where they were going to split the book. It was a good spot.
Overall, I am glad they split the book into two movies, it allows for more details in the films. The movie had excellent detail, the acting was superb, lots of action, and the slow spot in the movie matches the slow spot in the book. I'm happy.