This film is one of my absolute favorites.
It is very intelligent, gripping, the plot is written brilliantly and it seems so true and original that one immediately gets an impression of watching a documentary movie. Of course, what comes with it is that it is difficult and requires full attention so I am suspecting this is why it has such a low overall rating--it is probably not just for everybody.
It is one of these very few films that one can learn an awful lot of new information and gain an absolutely new perspective on our world.
Acting is also very good in the movie while directing is not perfect but still outstanding.