My journey with Korean Beauty begin last year. You tube was my go to in my search for products to help with my cystic/hormonal acne.  I had tried so many products I had given up. COSRX was one of the first brads I learned from. I tried coupe of their products; they do work but I think they did not work as well on my mature (38) skin. I begin using this wonderful product in the beginning of this year. I was shocked, this product does exactly as it says. It will definitely vary on skin type and concern and what other products are used. It is part of my daily routine. I definitely recommend.  When using -- a little goes a long way.  No harsh smell, easily absorbs. I love it!