I'm posting on this this weekend. The doctor who performs it, with a non-hydroquinone enzyme-blocker is very positive about the results. The enzyme blocker is infused deeply into the skin for efficacy. It makes a lot of sense and I believe SilkPeel is available in a number of derms' offices and medi-spas now. I quickly eyeballed the postings here and didn't see anything on it, but forgive me if I am reinventing the info wheel.