I'm a HUGE Harry Potter fan. I got hooked when my nephews were reading them.
I have been thoroughly impressed with all the movies up till now. Each movie had it's minor modifications but remained close to the original story line with the exception of this movie.
I found the directors/producers took too many liberties in rewriting some of the scenes and in doing so left out some important background information. This caused the movie to be very segmented for me.
I think we would have all liked to have had a longer movie that allowed the story line to remain intact.