wish I had more time to be able to review this, because these things take time to work, hence the 4 star review instead of 5. I can tell you that as of 2 days of use, the serum is not sticky and gross, and it goes on VERY easy. I have tried similar products in the past and many of them were thick and gooey and hard to put on, but this makes time cut in half because it's very lightweight and glides over lashes easily.