I enjoyed the movie.. however it was a bit hyped. My opinion of the band is that they might have some good 80's stuff ( have heard mostly Metal on metal stuff) but they were maybe too eager and spewed out albums almost every year or every other year ( and yeah maybe they should have been a bit more successful and were unlucky). Sometimes they seem full of metal cliches musicwise and might have just repeat themselves too often: Same sound, similar themes( I am forming this opinion from the limited stuff I've heard and seen + the movie, so this might be prejudiced...) resulting in lack of interest. I've heard some never stuff by them; too slow paced + bad lyrics.
Lips Kudlow seems like a cool dude but sometimes too naive, dramatic and craving for others to acknowldge him.
Rob The "the Edge" Reiner, the drummer sounded more sensible to me and seemed annoyed by Kudlow's over-enthusiasm, temper & all or nothing thinking.