I have yet to see this, but it remains on my list -- though I have read that the view this offers begs the imagination in ways beyond belief.
I don't know yet.
I will say that when a documentary comes out that can save a persons life, it must be the highest form of film-making.
I say this thinking of 'The Thin Blue Line', or that other great documentary highlighting the injustice of our legal system "Capturing the Friedmans".
I'll watch this soon and form my own opinion.