Review (4/5): No smell, no dye, easy application, and will last a long time.
The serum is clear and medium weight. Not drippy like water but also not as thick as vitamin e. The cap unscrews and there is a very thin bristle brush for application. Per the instructions, I put a thin line onto my upper lashes at the root, like eyeliner, every night. There is no negative side effects such as burning or tingling sensations or skin discoloration. It just feels wet after application but dries quickly. Because the brush is so thin, I expect the serum to last a very long time. It’s too soon to tell if it works but I am rating an optimistic 4 stars.