I am, unfortunately, disappointed with this product.
I like the idea behind the setting. I really like the fail forward implementation of Caltrop Core, and the ways the various "classes" interact with the mechanic. And the production value is fine.
However, it feels like a major chunk of this game is missing. There are numerous references to the power of the crystals, in both the setting description and the character blurbs, but there is no discussion of what those powers actually are or of what characters can do with them. Seems like a major oversight.