I loved this movie. I was quite pleased by the work Steve Kloves did on the screenplay. I think this was the most difficult book of the series to adapt (it's all about flashbacks etc). It was very interesting to me to see what was kept from the book, what was left out. It's wonderful to see how these young talent have evolved and blossomed in front of our eyes. The cinematography is gorgeous. It's dark but it's also charming and very funny at times. I was a bit disappointed by Order of the Phoenix but I'm giving a big thumbs up to Half Blood Prince.