Not really sure how I feel about the prism, I can’t decide if I like it or not. It’s soft to the touch, helps to protect the edges of the fidget cube, and covers up the seams in the plastic. It also bulks out the cube and provides a bit better grip on it as well.
It was difficult getting it on my fidget cube at first, but after a couple practices getting it off and on it got easier. However, the prism leaves very little room for some of the different sides on the cube. E.g. it was harder to properly click the switch button, and I found that I kept flicking/catching the rubber prism when trying to use my fidget cube which is annoying. The coiled cord clip is fun but I don’t have high hopes for it lasting long term. But we’ll see.