One of the dangers inherent in making a film about a popular book is that some good things must remain on the cutting room floor. Such is the case of "Harry Potter and the Half-Blood Prince." I found myself, while watching the film, noticing all of the stuff that wasn't in it. This, of course, is a disservice to both myself and the filmmakers, who crafted a wholly enjoyable, and fun movie. If you haven't read the book, you will really love this movie. If you have read the book, you will wish you hadn't. Overall though, this is still a very good popcorn movie, well worth the price of admission.