The dice themselves, as usual, are of good quality and seem well made. The "ultraviolet reactive, color changing" aspect however was a bummer. I understand how straight sunlight may not be "strong enough uv" (which i disagree with as an argument) but I even have an ultraviolet light flashlight and it still takes a full minute to reach what I consider an appropriate color change, and even then its clearly only in certain portions of some of the dice, which revert to their original hue almost immediately after being removed from the uv light. It's just a bummer I'll never get to see the dice in their "color changed" form unless im playing DND inside a tanning bed.