This movie was nothing like the book, they may as well have changed the title for all it had to do with the Half Blood Prince. It isn't even a decent movie on it's own/ If I hadn't read the book I would have left that movie more than seriously disappointed, I would have been rather confused. They made this movie only as a bridge between the first 5 and the 7th (both). Gives a whole new meaning to the phrase "based on the novel...".