I heard about it endlessly on satellite radio (Lithium), commentary by the director.  It sounded like it was a fairly honest portrayal, but I think you start something like that with your mind already made up that he was a freakishly talented guy.

"Montage of Heck"??  I think we're all adults here and won't be offended by the word "hell".  It is just a mythical place after all.