This is a must-see and one of the best documentaries - and films - of this year.

The movie is wonderful and true, an act of love in all its contradictions and complexity

The movie's neither hopeful in contrived ways, nor hopeless in different contrived ways. Somehow it manages to be wonderful

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