I have been using Mary Kay for over 10 years. Although I do not use their whole makeup line

I do use their eyeliners. The colors and formula is awesome! I've tried to use other eyeliners and none give me the color or lasts as well as Mary Kay's. It stays put until you take it off and the formula is perfect for smudging to achieve the smokey eye look. I love Mary Kay entire line. Their liners are waterproof and smudgeproof and last all day without the itching and I have allergies. There is nothing I really dislike. What I like is that when you hold it to the light you can see where yo are at so you know when you are running low, so no guessing when you need another. you don't need a sharpener. Its simple to use and it has a smooth glide, no pull to it.