Good start, but then it gets ruined

At first rather annoying in its heavy emphasis on reenactments, this movie ultimately proves fascinating, simply because the complicated, highly dramatic tale it tells still almost defies belief.

This is one of the few movies I've ever seen where the whole audience broke into spontaneous, loud applause a third of the way in.

The joyful confection is coated in a sparkly gloss, bright enough to gleam from the darkest, most cynical corners.