As a fan of the Harry Potter book series I can say that people having read the books can take heart, this film isn't as much of an editorial change as The Half-Blood Prince was. I thoroughly enjoyed this film for it's portrayal of the book fairly accurately, however for people who have not read the 7th book or don't have back story on some random moments, you might be lost as to what exactly is being referenced. Overall I would say it kept me entertained and waiting to see what would happen next, despite where the storyline takes place.