i have been wanting to try out gel eyeliners because i've worn liquid eyeliners my whole life! i thought i'd try this one out (black) because i do like SK brushes & lipsticks. I thought the price was inexpensive (compared to others in Sephora & dept. stores) and was a good way to start. It's about 90 degrees with high humidity and so far after 5 hours of wear in no A/C @ home it hasn't smudged or smeared. goes on smooth & you can make it thin or heavy as you apply. i also used angle brush. will have to wear from morning to night & see how it fares. will update if anything changes. i like it so far!