I liked it a lot at the start. But as the show goes on, each episode feels more and more pointless. This entire series (from what I've seen so far) could have been boiled down to three or four really good episodes.
Also, it's obvious that the people previously in this organization are trying to use this documentary as a way to say, "See? It's not OUR fault!"
We aren't really going to get many answers from this, so I'd say over half of this documentary doesn't have much purpose.