Wow this stuff is fantastic. I have a huge problem with acne on my chin. At 31 years old, believe me I've tried almost everything from high-end department store skin care to drug store brands to Proactiv. Everything has either dried out my skin or not done the job. Paula's Choice is exactly what she promises - effective and non-irritating. The first time I used the 2% beta hydroxy liquid, I couldn't believe how the condition of my skin changed immediately. My pores had magically shrunk and my acne seemed to be going away before my eyes. I've only been using it a little more than a week, but I can already see a dramatic difference in my skin's condition. If you've tried everything for adult acne and have pratically given up, don't until you give this a try!