Very well-made, engaging story-line that doesn't take too many liberties with the Truth of what took place. Fair, balanced coverage of the four subjects. The movie doesn't take sides, except to offer cautious hope for us All-- that the fossil-fuel grip on our automotive lives is not a permanent disability.
The film's basic premise -- why can't politics be a reasonable, logical enterprise (like, say, making an indie documentary?) -- is at odds with the realities not just of the American political process but also human nature.