I caught this at a premiere screening in Toronto back in June. It was a cool night, they even had a concert following it under the same ticket price. I couldn't go to the concert, but I'm happy I saw the film. Afterward I talked briefly with the director, and apparently he shot most of this movie by himself, with his own money. All said pretty impressive considering what he managed to pull off.
In the film you follow 3 different bands, all of which seem pretty talented and down to earth people. Bloodshoteye and 3 Mile Scream are younger, but seem to really have their head in the game. Tub Ring seem to have more experience and been around longer. Was neat to see their lives and how they clash with the life on the road and in a band. There's also a bunch of interviews with people from bigger bands, like Lamb of God and GWAR. I found Dave Brockie (Oderus' real name) from GWAR to be funny as hell, and really insightful. Classic rocker Frank Marino comes off best though, saying some pretty eye opening things.
If you're a musician artist or anything I highly recommend this. Piracy, label changes, the good and the ugly are all covered here in some way. You don't have to be a metal fan either, but it helps. More people need to see this film.