The brush of this eyeliner is very smooth and makes applying it easy. It's also easy to apply due to the shape of the product. Because of it you can keep the eyeliner steady in your hand. It's not hard to make a thin line like other liners. And the metal container of the eyeliner makes it feel and look very luxurious. The only bad thing about this eyeliner is that it's not completely waterproof. I got it in both black and brown black. I did not notice a huge difference between the two colors. They both just look black. I wish I would have gotten brown instead of brown black. Overall I enjoy the eyeliners.