The acting was very good. but if you never read the books these phrases would mean nothing to you even after watching this movie: Torturing children in the cave, The great white tomb, Hufflepuffs Cup, Gaunts, the prime minister and minister of magic, Bill as a part warewolf, tonks guarding hogwarts, the tiara ontop of the cabinet, fluer and bill, Nagini's importance, the sheild only death eaters can pass,nonverbal spells, battle at hogwarts, slugclub, Imperiused rosmerta... They may not be able to explain all this even in two movies now that they removed all this vital information and replaced it with a fake fight at the burrow!