I don't have them, but I have fondled them. They are a very cleanly executed, solid design. They are similar to the standard bar stock sliders like HighCountry, SG, RoverTyme, etc... but much better executed in design and finish. Almost too pretty, because scratches are noticeable when you rub 'em against rocks.
They do not protect the compressor or tank, and they are only under the door sill, so the potential of tweaking your truck body is still there on a really solid thump, but they will very effectively handle any threat to the bottom of the door, provided that you choose your line carefully...and dont' slip
