The acting in this movie is phenomenal. It is so good it almost distracts from the huge cuts from the book that are key to the story line. Very disappointed in the lack of the build up to discovering who the Half Blood Prince is. Its reduced to a short clip and one line. I'm the half-blood prince. I would have imagined that with it being the title they would have spent just a moment longer on developing that part of the story line. My suggestion would have been to not add in so much development about the characters growing older, especially when Dumbledore tells Harry he needs a shave..... and replace it with key moments from the book.