Hi Wideglide,
I don't use them. Like the supports they sell to go under slides, they impose forces again the step (or slide) at the points where it is connected to the PC, not just when you enter/exit the coach... but impressed twist forces when you walk around the coach, or when wind blows the PC. This causes more damage and wear than just using the step. I think the slide supports get more chatter because people have more problems with slides, but same principle,
Even if you have the HWH levelers there is still a little bit of motion between the coach and the ground... This step stabilizer it going to hold the step rigid and fight the coach motion.
The better approach is to be kind to your steps and not stomp on them,,, just walk in and out. I weigh more than 200lbs and my PC is 16 years old. The steps are still firmly welded to the frame. No wiggle.
Larry