The Half-Blood Prince is totally different from the previous Harry Potter movies. Sure it had the basic plot similar to the book, but in my opinion too much of the original story was left out . They focused on too much side activities that left me wondering why they left out so many key points that the book had to offer. I really think the producer missed out on an opportunity to make an extremely good flick, as the book offered so much content that would have looked really nice on film. I think what people want to see in the next films is something that covers more of the plot in the book. Luckily, the Deathly Hallows is split in two, so they will have potentially 6 hours to cover the whole ending. Overall, it wasn't a bad movie though.