These marker pens are wonderful! I love them for coloring in my adult coloring books. The colors are bright and vibrant. They blend well. There are a few things that make them 4 stars rather than 5. The pens have a few that are very close to each other, so much so that you can't really tell the difference when using them. This is mainly in the blues. Also, while this is a nice set, I would love to see a blender pen included to help blend colors. These pens fit well into small coloring spaces and provide even coverage. I would be interested in buying a larger set.