Went to 1:00 pm show today at Phipps, and it wasn't too crowded. Tried to go yesterday, but all shows were sold out.
I notice the Hogwart setting is different than the first two movies, and I like the third setting much better, with the big clock tower (awesome clock!) and the stonehenge area above Hagrid's hut, overlook huge opening water. (btw, I saw the filming session, when Harry flies over that lake on Buckbeak, it was in Glen Coe, Scotland. Our tour got delayed by that, but I didn't mind!
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I think it would be difficult to be as detail as the book people mention here to be in the movie. If they do, they would go for five hours! But I do agree some crucial details were left out, and I wish they were included. My friend hasn't read the book yet, and he gets confused by the scene explanation in the Shrieking place.
I like the way they start to introduce other houses than Griffindor and Slytherin into the movie, like the one with yellow Quidditch robes. In the first two movies, it seems that only two houses exist outside welcoming feast, where people are walking around, their ties always in green-lime or red-yellow colors. Well, it still does on PoA, but at least there is a hint of other houses exist.
And I really like the Maurender's Map! It has a really cool layout and labeling. I wish they revealed the big sand clock for houses points, I always have troble imagining how they would look like.
Where is Professor Flitwick, the charming prof? And where is Oliver Wood and Jordan Lee (the Quiditch commentator)? It seems odd not to see them in the movie. Oh, and good Hogsmeade setting! And I like the Whooping Willow always smacks that little blue birds
Anyway, overall, I like it. I would scale this movie 9/10.