Since I've read the books (several times), I go by my wife's impressions, since she hasn't read any of the books. As usual, she required at lot of input from me to understand what was going on. But, if you're a fan, you'll take whatever they can give. The humor was especially good in this film. However, even though they showed the cabinet with all the memories, my wife didn't realize that was the main thrust of the book along with Dumbledore passing the torch to Harry. Overall, I left with a positive impression of the movie. But like any fan, I'm always disappointed by what was left out and what seemed to be changed (like the invasion of Hogwarts).