for light use, they are ok. I bent the factory one up rather easy on our rubi. it mounts only to the pinch and in the end molds its self into the body causing dents. I like the kind that are max clear and come with body armor plating. The rocker on a Jk is paper thin and one of hardest areas to repair once its bent.
The best protection made can be real expensive. like Nemesis, Currie, PSC close to 1K. some are very heavy too. I ended up with JCr stage2's(american made), I had some "points with them" and with that cost was 310$.
Last run I slipped off a V notch and the rail caught the Jeep on a rock lip. I thought for sure there would be damage, sounded bad felt worse. Had to back out the V notch grinding its way down and redo the line. just removed the paint.
That rear Fender is from many uses not related to the lower rocker slidder we are talking about. But having all of it metal and installed right makes the whole side of jeep like a rock rail