Purchased these for my 90-year-old Mother-in-law to use in her coloring books and she absolutely loves them. One of the pens was almost dry, but one out of 36 isn't bad compared to some other sets we've purchased. The only complaint we have is some of the lids are on so tight it takes a strong hand to get the caps off. If we weren't here to help her with that, she would be unable to use several of them. She likes the storage case they come in and raves about these pens to all her friends. Much better for her than the colored pencils were. She gets intense, vivid color on her drawings. She's been using these everyday since she got them and so far, except for the one pen that was dry, they are still laying down awesome color. I was afraid they wouldn't last very long, but that has not been the case. Definitely would recommend these pens to any avid colorist.