GREAT day time serum. I received this in my Serum Sampler (which I totally love btw) & have been using it in the morning since the weather has gotten cooler & humidity has gone down. It is EXTREMELY lightweight & absorbs readily into the skin - no lingering film or stickiness. Feels almost like you have "nothing" on but I can definitely see the results. With the drying weather coming in, I've noticed tiny flakes showing up on drier areas of my face however since incorporating this serum, the flakes have disappeared to reveal smooth, firm & moisturized skin. Totally does the job without feeling like another "layer" on my face & works great under makeup. Highly recommended.