The reviews talking up this film as "the best one yet!" are only your standard hyperbole for a long-running film series (think Star Trek). This film is definitely worth seeing, but as far as I'm concerned, Prisoner of Azkaban is still the best and hasn't yet been topped.
The film is subdued, but involving in its focus on the characters. The ending is rushed and is unacceptable to me, but the rest of the film is all right.