Just before you get excited, it takes 30secs to refresh
There is a single competitor DES color, but they seem to be in presale since years. https://www.youtube.com/watch?v=ckFJar6NC0o
I think it might be because I think two screens are using different algorithms to change images. Mine can only do a full clear, the author mentions that you need to do full clears from time to time to avoid ghosting or permanent burning. So maybe 15 secs is only for non-full clear image change
Tbf not much difference between 15 or 30 secs when it comes to usability