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

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

Great story, amazing characters, superb action, enthralling cinematography. Yes, this is something I am glad I spent money on.

Each character in this movie — down to the smallest one — is an individual rather than a type, prone to spontaneous changes of mood and sometimes amusing outbursts of pettiness or ill humor.