I’ve tried tons of Vitamin C serums from the top recommended to the obscure ones. They either haven’t worked, have made my face flush, or broken me out. I was ready to give up on ever spending money on a vitamin C serum again, but I decided to try this one since I love Renee’s moisturizers and cleansers. I am SO GLAD I did!! It took a few weeks, but omg my skin tone evened out so much. It was the first time I’ve actually seen results from a vitamin C serum. It also layered beautifully under sunscreen and makeup - no pilling at all. It’s silky, not tacky like other Vitamin C serums. It absorbs wonderfully and smells lightly of citrus. I’ve already repurchased and will probably set up a subscription. It’s absolutely worth it!!