After ordering an adult coloring book i knew that i needed some great markers. These write very smoothly. I've seen some reviews about the colors not matching their cap color, i have not had this happen to me. The colors have been true. I do regret not getting the bigger pack. I thought 36 colors would be plenty, but i find myself wanting more shades and colors now that im into my adult coloring book. I've only been using them a few weeks but colors are still working great. I look forward to many more coloring pages with these markers.