After 12 years of trying every eyeliner out there...This one and the liquid water proof eyeliner from MAC would be my top.
It may not be easy to use at first as this product has a rubber angle tip to apply but once you get the hang of it, it glides on easy. Takes me literally 2 seconds to make a wing or cat eye. Also make sure not to leave the cap off as it will dry out and harden.
Everyone has give poor reviews however when you travel, walk in the rain, go swimming, or tan out in the hot sun... this eyeliner will stay on ..