The beauty of the Harry Potter series was that each book and film was a whole story in itself as well as building a bigger arc. This film takes over two hours to establish furthering of the narrative: the whole point of the film literally happens in the last 10 seconds.

I swear, this had better be building up to something worthwhile. This film as a stand-alone was pure rubbish (although visually spectacular rubbish).

Save your money, see it when it's on free-to-air TV, and wait for the next movie in the franchise.