When you place the keyboard in the center, it looks like the keyboard emits a rainbow like a prism. It's really pretty. It looks especially beautiful when the rainbow is reflected on the stainless steel housing.
When determining whether I think a desk mat is of good quality (design is subjective since something that may look nice to me may not look nice to someone else), I look at the stitching, whether the colors (unless it's plain black or white) are vibrant, and whether there are any imperfections.
For this desk mat, I don't see a stitching issues, and the colors definitely pop. Beesley, Cthalupa, and the Drop team did great with the design, and making the design a reality!