Great value for the amount of colors received, and the colors are very opaque. The carrying case is awesome. Unfortunately, the markers damaged any paper I tried to use with them, similar to when you overdo it with watercolor, except this happens on the first pass of the marker. Something in the formula or perhaps the brush tip does not agree well with paper. Perhaps they'd perform well on other surfaces.
I love the labels on the pen caps, but they are on the opposite side of the pen cap clip, so you can't steadily store the pens with the color label upright and visible. You'd have to stow each pen balanced on the cap clip to keep the color label upright. There should be no clips on the caps. There should also be a color label on the pen itself as it's easy to mix up the proper cap and marker.