I dont know....
I've never read the book, and never seen the documentary, so bear with me. I thought the movie was good, but Mac's acting was just SO annoying!!
I can't say that I hated it. I definately didn't think it was fabulous either. But I do think its worth watching--good plot and the fact that its all real is good enough reason to see it.
The parts that I liked the best were the fucked up heroin scenes. Like at the end when the rat tells the "real story" and when Seth Green hallucinates about writing the whole book--- I laughed my ass off!! That kind of shit has happened to me so many times.
What I didnt like was-oh who said it, Dtergent? that said Mac kept laughing like dr evil? lol yeah and its almost like he had a wannabe british accent the way he ended his sentences like a question-maybe the real guy talks like that but it didnt sound gay to me, it sounded--ugh fucking annoying!!!