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

It’s not bad or unwatchable but despite the amplitude of the spectacle, the end result is underwhelming.

Unshakable, witty and deeply felt, the film will be paying emotional dividends for a long, long time.

If you like to be scared, if you like to laugh, and if you like to learn a thing or two at the movies, this absolutely cannot be missed.