What makes it different from others?

Very well executed

If you're interested in the topic at hand, you should just watch it and judge yourself because the reviews have gone very biased by people that didn't even watch it and just hate (or love) the creator. I liked it, it was well written, narrated, and directed and it was about a topic that interests me.

A great movie, one of the best of this year. There was a bit of confusion at one point in the plot, but nothing serious.