You could argue that a blockbuster movie in the Harry Potter universe taking its time and telling a somewhat complex story of family relations, unknown origins and he hunt for an evil wizard instead of delivering a by the numbers magic show is a good thing. That doesn't change that some parts during the first half of the film are bit hit and miss. The cast is not one of them, it works. Jude Law is a fantastic young Dumbledore, for example. The creatures are great too, making for some of the most wondrous moments, of course. The film shines during its gloomy and exciting finale though and ends with a major plot twists that will have Potter fans discussing until the next part comes out. That's this film's problem, in a few years it will be viewed as merely a transition piece to get to an even bigger film.