The reviewer, Kevyn, introduces the product, Rules Of Mastic IX Drop by Too Cool For School, in their video review. They mention that they are also trying out the Recovery Balm from the same brand. Kevyn appreciates the breathable consistency of the serum, which doesn't suffocate their skin or clog their pores. They find it hydrating and love the glow it gives to their skin. Kevyn recommends adding this serum to one's skincare routine for a hydrated and fresh feeling. Overall, the Rules Of Mastic IX Drop by Too Cool For School Repair Serum seems to be a promising product that provides hydration and a healthy glow without feeling heavy on the skin.