It is difficult to know why this film has done so well when it is so badly made. The subject is fascinating, but the hand-held camera shakes and swings around, there are sudden close-up zooms to a face with equally sudden zoom out, for no apparent reason, and very little has been shot with the help of a tripod. There is no commentary, which might have helped a bit. I got the impression that no editing had taken place, because there was so much in this film which should have ended up on the cutting room floor. Views of clouds, dogs, and extraneous shots of nothing much at all, add nothing of value. I was torn between giving this one star or two, purely because the subject interests me. The credits for Direction, Photography and Editing all go to Jonathan Nossiter. With a proper film maker, this could have been really good.