it watched it and yes, it was very good.
his career shows how it's hard to have a true passion for something without having all your chips in the pot. he choose football over everything, including family, and couldn't even live 'normally' without it in his life. that's not to say he was necessarily a bad guy, that's just one of the themes i took from the doc.
*spoiler*
the part about the 8 hour coaching seminar on one play, i think the one you mentioned, was astonishing.