I have read all the books and have seen all the movies and this one was very different it was probably the one movie most unlike the actual book I felt you didn't need to follow the series at all to enjoy this movie. However, it is a little disappointing to read the books and then watch the movie and it be way way off. It was more like a very funny (loved the humor but was not looking for that in this movie) comedy to me then the adventure suspense type the others and books are. Really missed the big fight seen at the end of the book with students & professors against death eaters