Lovers of the book series will really enjoy this movie. The producers altered a few things for time but overall the movie was very true to the book, some scenes were even better. There was subtle humor throughout, which is definitely a feat as how most of the movie (and book) is Harry and company blundering about with no idea as to what they should do. People who haven't read the books might be a little confused, because they did omit a lot of plot points in the previous movies and in this one, this is probably because they expected people to read the book first (i would definitely recommend it, because it is no fun to be the friend who has to bring the other up to speed once the movie ends, come on, its just common courtesy). All and all this movie may have been slow to start, but the book was as well. People who are expecting an action pact experience should probably just wait until it comes out (this isnt to say that there is no action, there is just more to it than that), but those who enjoy subtle humor and scenes that might just yank your heart out , enjoy!