The Yes to Blueberries Intensive Skin Repair Serum is the best! I usually use the cucumbers or tomatoes line because I don't have any problem with aging yet. The blueberries line is specifically designed for anti-aging. I decided to try the intensive skin repair serum because I heard great things about it improving skin tone. I have been using it for a year now, and I have noticed a huge improvement in my skin tone and texture. I put this on at night before my moisturizer. I only use a small amount because if I use too much it leaves my skin feeling sticky. This serum doesn't absorb too well, so I don't think it would look good under makeup. I wait a few minutes before applying a lotion so that I can make sure it is completely dry. When I wake up the next morning, my skin looks better than the night before. My skin looks refreshed, and it feels softer. It has a fruity smell that I don't like, but it's not too noticeable after it drys.