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

True to its essence, the characters remain on the same line and manage to entertain the viewer, each highlighting their own distinctive qualities or touches.

The movie's not perfect, but it sticks the landing of its message. It was engaging - thrilling at times - and I personally thought it was a great time.

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