Self-important, over-dramatic, uninspired.

It's no definitive masterpiece but it's damn close.

Blending excellent reporting and strong storytelling, this is a disturbing film truly stranger than fiction

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.