Refraining from a star rating, because:
A) In the world where a documentary is rated based on subject and access (see: CITIZENFOUR) this is a 5/5. It's incredible. It's heartbreaking. It's thrilling. It’s miraculous. It's an artifact that teaches us about the world, that bears witness to something previously hidden from view. Every moment spent with the defectors and their families is absolutely essential viewing. I was floored. Not only by the footage, but by the director’s palpable empathy. She…