I love this cleanser. I've been using this for a few months and I've only gotten a couple new blemishes which is pretty unusual for me. I even went through two PMS periods with nothing major popping up. I think the combination of salicylic and glycolic acid really works to exfoliate and keep the pores open which allows BP to penetrate and kill bacteria. I even use this around my eyes and I don't think it has caused any dryness there.
It has helped with my cystic acne by unclogging pores. I noticed black heads on nose disappeared. I've used 30% for a couple minutes all over. I also use 20% as a toner and leave it on. I've used 50% on spots, but that's when I run into trouble. Maybe I should stick to the 30%. Twice a week or every 4 to 5 day is good.