I also received the deep space set recently, the purple ones are extremely unreadable, yet the alphas are surprisingly pretty, the purple on blues are slightly better (polaris's)
Of course, if the lighting in your room is at extreme levels, the deep space would shine (a star trek style illuminator would serve this set good, the kind that illuminates the starship codes)
I bought the adapter kit for the 1u \| '~ and the 1.5u backspace, for the infinitykb, now I'm craving the 1.5 polaris backspace from the ergodox set, but obviously 43$ for one keycap isn't just, should probably start a classifieds thread for edge needs like these
Beautiful gif by the way, very beautiful