I wastched Harry Potter and the Order of the Phoenix last night for the first time since seeing it in the theater and felt while it got the story lold alright, it was too light-weight compared to the book; there wasn't much of Harry's emotional distress at being isolated from the wizarding world for that first month after the return of 'He, Who Must Not Be Named' and his blow-up against Ron and Hermoine when they were reunited. Or His blow-up at Dumledore after the death of a main character.
And Dolores Umbridge wasn't wearing her ubitiquos bow in her hair and didn't look like a squat frog; and he didn't get together and break-up with Cho Chang. Oh and Gorp was done quite well and I enjoyed his interaction with Hermoine. However, for such a long book I think they did the best they could in the time allowed. The next two may even be harder to do.