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

It is neither dumb nor smart enough to be fun, and spends way too much time with its boring human characters.

A film of deceptively outspoken contemporary relevance, this is cinema at its most alert, alarming and alive.

It's simply great fun, a winsome film and an occasionally over-the-top luxury fantasy that never flags.