They interviewed Crystal Moselle, the woman who made the film, on NPR about a month ago.
That their father could get away with what he did to them for so long shows we have a ways to go as a society. Their way of dealing with it was indeed awesome and all credit goes to them for not being as screwed up as they could be, but humanity failed these guys in so many ways it's not funny.
I so want to see this film. I want a happy ending for them.