I've been using the Skin Concentrate for the last few evenings and I've noticed a considerable improvement in the tone, clarity and finish of my skin. As someone with sensitive, oily skin, it can be really challenging for me to incorporate a new product into my routine without worry that it'll make me break out. But this serum is legit one of the best I've ever tried. I've been waking up with skin that looks refreshed, and it's even helped with some of the fine lines and wrinkles around my eyes. I honestly feel like my skin is glowing. Would highly recommend this product to anyone looking for a high-quality way to wake up and clear up their skin.