I've got the supersliders, but I bought them used. Before stumbling across the used pair from Knappster though I had already decided I was getting them because of the price difference, and that they function as a step for roof access when the doors are closed.

I'm not sure on the install side being easier. I had them welded on because I couldn't see how I was supposed to attach them to the frame. (I didn't have instructions though either but Knappster also had them welded)

Downside to them is that they don't give you as much ground clearance as the 4xGuard sliders.