My skin was very predictable, every month, right before my period, I would get that terrible cystic acne (large, painful, deep under the skin) in areas like my chin and sometimes around my nose. I have combination and sensitive skin and it's challenging to find a product that would treat the acne without damaging my skin. I came across this product and was willing to give it a try because of the customer reviews. Ever since I've been using this (it's been 4 months), the cystic acne hasn't returned. When I first got this, I was using it twice a day to help clear the acne on my chin. As that went away, I started to use it once daily (at night after washing my face) because it does leave my skin very dry. After two months and the acne wasn't showing up, I decided to switch to the SKIN PERFECTING 2% BHA Liquid and I'm still getting great results. I had to post a review because this product actually worked for me in treating cystic acne.