Granted, I like Metallica- my formative years were shaped by the metal scene. I've totally outgrown 99% of that music but I still listen to Metallica's 'Black Album'. In terms of composition and structure, I think its a good album for that genre.

Anyway, I really liked 'Some Kind of Monster'. I liked it for the all the reasons your cited and also because I was interested to see what kind of people the band members had turned out to be now they'd been around the block six or seven times, middle age had set in and they had different concerns as being in a different part of their life.

The Dave Mustane thing.. Well, he's all kind's of fucked up but I think the movie kind of lets you in on that fact in a small way. My ex auditioned for Dave Mustane years ago after Megadeath had kicked out their latest guitarist. The audition was held in Mustane's hospital room in a chemical dependency treatment center. He had just od'ed on heroin and was going through detox but so totally loaded the drugs that they give you to make it less painful and horrifying that he was barely awake or aware of his surroundings. My ex was offered the job- he saw the writing on the wall and turned it down.