Last summer I was just riding along and sliced open one of my pirellis (ok i was going too fast through a loose, rocky, downhill turn in the middle of glacier), and after a couple seasons on the same tires i decided to try something else. We had some nice, big 45mm challenge getaways on the shelf and my new bike had the room to fit them so that made it a pretty easy decision.
These tires look really good and are like big fluffy clouds to ride on and they go fast. For tires that actually have tread, they are one of the fastest things on bicycle rolling resistance. Out of the box they measured over 47mm on a 23mm hookless rim and are more like 48mm now even at 25psi.
So that was the good, but there are some drawbacks. Mainly, cornering grip is not really great especially if it's loose. the big edge knobs of the pirelli gravel RC are really good and those come in big sizes too. I also do not trust these around sharp rocks. But after nearly 3k miles of riding through the fall and spring I have not had any punctures and now they're due to be replaced.
These definitely get my "would buy again" seal of approval, and they look good. But next I'm going to try the new schwalbe g-one r/rs pro in 50mm, so we'll get that posted sometime soon once I put them on.