I've been using this serum for a little over a month. At first, all I could tell was that it went on smooth in a nice gliding sensation when applied to my skin. I also liked the smell. Now, I am beginning to see positive results. The acne scars from my old cystic acne are beginning to fade and my skin tone is starting to even out. It's important to do as they say, and use a little of this twice a day to see maximum results. I'm going to keep using it in the hopes that it continues to work.