Next in line as preparation for the new Harry Potter movie is the 3rd in the series: Harry Potter and the Prisoner of Azkaban. This 2004 film has a new director and a new look with Alfonso Cuaron. I like Lupin and Black and the depiction of their relationship, which was exactly as I had pictured it when reading the book. I don't like time travel as a device in books or films.
Rolling Stone says it's the best of the 1st 3 films. Salon.com agrees, saying it's "the first to capture not only the books' sense of longing, but their understanding of the way magic underlies the mundane". The New York Times calls it "the first one that actually looks and feels like a movie, rather than a staged reading with special effects." Roger Ebert likes it but likes the first 2 better. Variety comments on the PG rating.