Recently I have gotten back into adult coloring books so I'm always on the hunt for the best things to color with and that never includes crayons and only rarely colored pencils. I much prefer pens and markers since they tend to have a finer tip for detail work and they also give more vibrant colors. This set is definitely no exception. I love the colors since they are different than the other finelines I have. I was a little disappointed that it was 2 sets of th same 10 colors and not 20 different colors but it ended up working out because my son loves them too so we are each able to have our own set.