I have been looking for such a long time for a product that could help with my acne and this is the winner for me. I started with just once a week for 2 weeks, than twice for another 2 weeks and now i'm using it 3 times a week. In just about a month and a half, this and the Natural BHA Skin Returning A-sol, have helped me get rid of the acne that I had on the cheeks and chin. It stings and tingles for about 5-10 minutes the first 2-3 times you apply it, but after the skin gets used to it it feels perfectly fine. I read that a lot of people find the smell unpleasant, but mine doesn't have a scent... For reference I have oily, dehydrated, sensitive, acne-prone skin.