Just saw it at a local festival (we have a great cinema at the University).
I almost lost it with the inuits, these old people enjoying the music were just a few seconds close to made me cry. The ending is just brilliant, Jack White III's face sums up the entire documentary. The cinematography was aces here. Minor complaint the camera was too in love with Meg, it was kinda distracting sometimes.
I saw this first, back to back with It might get loud. I think the later just cemented the myth with the scene with saying all the "superfluous" stuff was done in order to play songs made by him (he is holding and old blues record I wont spoil it).