I love this product. My aesthetician recomended this serum during one of my facials and I noticed the difference in my skin as soon as I started using it. I srtuggle with acne and this really helps me control it. My pores also look smaller. I loved the product so much that I decided to try more PCA products. I used to get facials regularly but now I have no need. The PCA products can be pricey but a little goes a long way. My serum last over 3months(I use it daily day and night). I now use the BPO cleanser, the Nutrient Toner, the A&C serum, and clear skin moisturizer. My skin has never looked better I get compliments all the time.