Great, dependable product! I used Stila Stay All Day for ages, but found it was starting to ball during the day, wear off on the waterline and have spotty pigment with non-black shades. This one doesn't smudge, is totally waterproof, but removes easily with soap and water. It's also easier to control- it can go on thickly or extra dark with a heavy hand. A thin, light line is more subtle and appropriate for day. Other long lasting eyeliners tend to have a thicker product applied almost like a paint, if that makes sense. This is more like pen ink as in the name. Highly recommend, hope there are more shades in the future! UPDATE: After a more rigorous trial, it ended in big disappointment! Turns out it's no match for a continuously watery eyes during a cold. It rubbed right off. No more liquid eyeliners for me, they just can't stand up to daily life.