We went out on the lake today with the keel guard attached. Works great even on our lake with all small sharp shale gravel. It got cut up a bit just a few nicks but shale is like razor blades so it work real well. We would never ride up onto shore before. We always had to anchor and back in and tie the boat off to the shore. Now with the keel guard we just pull right up on the shore no problem at all. Love this thing we should have had it yrs. ago.