I have been using this serum for about 4 years. I have oily, reactive skin that is prone to acne if I don't baby my skin with proper diet and ideal skincare. I use this in the day under makeup and sunscreen, over a layering of various toner/lotions. My skin can get a bit pink sometimes and I love the way this serum calms the redness and gives my skin a plump, even, youthful glow.
I have repurchased this several times and my only wish is that it were cheaper but a little goes a long way. Typically a bottle will last me 8 months to a year since I only use one pea-sized drop a day.