Fans of JK Rowling's books have come to expect that the screenplays for HP movies will differ substantially from her books. (Realistically, how much can you cover in 2 to 2.5 hours?) That being said, I was pleased to hear that Book 7 would be divided into 2 films, and hoped that more of Rowling's excellent plot details could be included that way. Oddly enough, the film version of HP7 - Part I extends a good 2/3 to 3/4 of the way into HP book 7, continuing that unfortunate previous pattern of leaving out plotlines and characters, and I'd say not for the better; and making me wonder if an hour of the final film will end up being devoted to endless special effects in the Battle of Hogwarts. I love the HP series enough that I was dying to see this film; I left feeling let down. IMO, the 3rd film, Prisoner of Azkaban, is still the best of the series. If you're a die-hard Potter fan, then go to see this one as part of the series. Otherwise, you may not be able to follow the plot of this as a stand-alone story.