Excellent
For those that liked the tone and style of his Mcnamara piece, you'll love this
I saw this last weekend.
McNamara and Rumsfeld are day and night as human beings, and it really comes through in the interview.
Rumsfeld might have been the world's greatest PR man for the Lockheed or British American Tobacco, if he wasn't too busy selling the war.
Production and interview style aside, there's almost nothing in common between the experience of The Fog of War and The Unknown Known (what a great set of movie titles, by the way). Where McNamara's interview is cathartic and illuminating of a man who's obviously haunted by past mistakes, you come out of The Unknown Known feeling like you know the man no better than when you went in. I've never been so enthralled by a documentary where I learned so little. Even in his post-career documentary, Rumsfeld gives a sheer masterclass in obfuscation.
Morris wrote a 4 part analysis of Rumsfeld following production of the movie for the New York Times.
http://opinionator.blogs.nytimes.com/2014/03/25/the-certainty-of-donald-rumsfeld-part-1/To be honest I'm not sure whether I agree with his conclusions, but it's still pretty entertaining reading, and useful as a companion to the film.