Excellent. It is long but fast paced and everyone in the theatre seemed to love the whole thing. The consensus among the group I saw it with was that it was the best of the neck and neck with one of azkaban if not the best. I happened to have the time to reread the book just prior to the showing and I noticed discrepencies between the two, though I still thoroughly enjoyed the film and will see it again in theatres. If you are not reading the book just before, then no worries.