The Onyx Ultra Matte Gel Liner in Black color by Melt Cosmetics is a game-changer when it comes to achieving the perfect eyeliner look. Mariko, the reviewer, was impressed by the packaging, which came in a luxurious glass pot. As a beginner in using gel eyeliner, Mariko found this product to be extremely beginner-friendly. The gel liner went on smoothly and effortlessly, providing a rich and crisp finish. Mariko took her time with the application and was pleased with the results. The Onyx Ultra Matte Gel Liner is highly pigmented and delivers a bold and intense black color. Overall, Mariko's experience with this product was positive, highlighting its ease of use and impressive performance.