I saw this at the midnight movie and maybe I was just too tired but I didn't like this movie. I am a huge HP fan. I have read all the books and seen all the movies. Of course, the books are much better but I felt they really missed the mark on this one. This movie was more of an outline of the book then a complete storyline. It was like they took pieces of the original story and used unnecessary filler (the Weasley's house burning down. Why?) to try to make a new story line. And then burning of Hagrid's house burning without the battle leading up to it as in the book seemed pointless.
I'm sure the movie will do well but if you want the real story - read the book...