I love this stuff. I use the 'very black' waterproof version and it stays on forever, even lasting through a sweaty, face-mopping ballet class. I love the applicator; it get in every cranny and lets you pin prick the color between each individual eyelash and on the water line... I also love that there are no individual brush hairs to get straggly or come loose. I will say that, like most liquid liners, this stuff acts like its own solvent. Before you go over a line you've just drawn, let it dry thoroughly and use a very light hand.