Like many of you, I liked the movie, but felt that too much was left out - especially the explanation of Mooney, Wormtail, Padfoot, and Prongs.
I did appreciate some of the little scenes and details that I'm fairly certain weren't in the book - Draco's nasty little cartoon of Harry, Hermione punching Draco
, the lollipop "floating" through Hogsmeade, etc. As Harry is running away from the Dursleys' at the start of the movie, note that Aunt Marge can be seen floating around in the background and screaming.
I'm going to be very interested to see what they do with GoF.
ETA: Someone really ought to clue Harry in that an Invisibility Cloak isn't much good if you're walking around outside when there's snow on the ground.
