If you're a big fan of Brian Jonestown or Dandy Warhols (the former especially) you'll enjoy the movie. It's very honest, Anton has no problem showing his true self or the problems he went through during the years the footage was shot. His obsession with music and passion for it is shown in every other scene, and certainly explains how they are able to release so many albums throughout their career.
This is not a slow, meditative documentary that analyzes music, inspiration, other artists, etc. in a way like Keith Richard's recent documentary. Instead it's a visceral look at the life of musicians who openly consume hard drugs, who get into fights on stage amongst themselves and the fans; not just physical but also a battle of egos.
Watch it with friends if they too are fans of the featured bands, it's an entertaining glimpse of a musician's life in the studio and on tour.