It's a great movie, I can't believe other reviewers couldn't see that. It is not for everyone, sure, and maybe you'll find some things offensive in it but it is a punk movie, after all. I don't think you should watch it for Joan Jett only, and the movie is not about her. But Ray Sharkey in the title role, wow, it's one of his best roles, I think. He is totally sleazy and insanely charming, crazy and captivating. The movie itself is extremely fast, violent, messy, nightmarish, funny and clever. Maybe if you expect something conventional, it might be difficult to get into it, but if you can open your mind, you'll feel how attractive it is.