Review title is Great, easy to use, self-sharpening eyeliner! [SEP] I absolutely love the little sharpener installed inside of the cap that allows the eyeliner to be &#34;always on point.&#34; With a simple twist of the cap, the eyeliner is ready to use which is perfect for someone like me who is miserable at attempting to sharpen eyeliners. As advertised, I have found that this eyeliner is waterproof, but whether or not it is smudgeproof is a bit questionable. I think that really depends on skin type, and for me, I have found that the eyeliner lasts really well for a few hours before starting to smudge and transfer onto my lower lashline. I think priming my eyelids would help the eyeliner last a lot longer, but I'm usually able to touch up on it every so often so that it looks &#34;on point.&#34; Overall, I love the eyeliner and would definitely consider buying again when my current one runs out!