I was totally surprised at how great this film.You could feel your paranoia rise as the film went on and as you gradually learned the details of the real situation.

If the ambition is to provide two hours of instantly forgettable, popcorn-munching escapism, it succeeds.

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

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