The cleat covers protect the cleats, not the pedals. I have a set for my Look Keos. I rarely use them, however. I don't typically walk enough in my road shoes to bother with them. Look also started putting little rubber grips on their cleats. That makes walking in them a bit easier. I do bring them with me for a couple event rides I do where there is a bit of extra walking at the SAG stops, so from that standpoint, they are handy to have.
Live with intention. Walk to the edge. Listen hard. Practice wellness. Play with abandon. Laugh. Choose with no regret. Continue to learn. Appreciate your friends. Do what you love. Live as if this is all there is.
--Mary Anne Radmacher