Between my children and I, we enjoy doing many things artistic. Between art projects, crafting, scrapbooking, coloring I purchase a lot of gel pens. I have to say this set so far is my absolute favorite. Not because of the case either, even though the case is absolutely awesome. I used every single one of the pens to see how well they worked. Not one pen skipped or ran rough. Every pen worked from the very first stroke and filled in every space with ease. On the thinner, cheaper paper the pens did leak through some but on the good quality paper, they were perfect. The ink dried fairly quick afterwards also which reduced smearing. I love the fact that the set comes with extra ink to give extra life to the gel pens.