Not a small feat to take such a still subject and move it along swiftly and gracefully AND do so for a broad audience. Impressive weaving of present-tense and backstory. It left a stone or two unturned, which bothers some critics but not me. You can only pack in so much before a doc loses focus. Oh to be a fly on the cutting room wall... And this article by Sherry Turkle is a great companion piece.