What do you think about about Harry Potter and the Half blood Prince?

I love this one! I love the climax. Of coarse the first time I saw it, I was left shell shocked when Dumbledore dies as we all know, but seeing the rest fixed that ;) I like in this one how is was almost like a mystery between Tom Riddle and Slughorn, Snape, Draco, Dumbledore, just kinda everything. This movie kind of started majorly climaxing here. It's like now Hogwarts is just a blur as they begin Horcrux searching. :D