I don't use a cover for my PW3 (nor I did for previous models) considering the recessed display a sufficient protection from scratches.
Today I bought a cheap cover (about 6 usd)
link . For that price, I can afford the risk of not even using it.
what's the experience of KO and KV users with their screens? Is the new design with the screen completely flush with the bezels more prone to scratches than the old models with a recessed screen?