Why so much hype?

Tells a fascinating and unsettling true story, and does so well, without pretending to have all the answers.

The movie's neither hopeful in contrived ways, nor hopeless in different contrived ways. Somehow it manages to be wonderful

I think this is a new genre that they're all sort of working their way through it and haven't got all the kinks worked out yet but it's a genre that works for me.