Has anyone had this done, and were the results worth it? Are there any problems that can arise? I phoned a local place in town and they said that there might be some burning, and light scarring that should go away in a couple weeks, which kind of scares me a bit. I want to get it done on my back, but dont want permanent scars either. Looking for some input before I decide to try this. She also told me it would cost $400 bucks a session, and would probably take 4-5 sessions. Any info would help, thanks.