They don't really do it for me. On the same link, there is 'A/T Rock Rails Guards' under the main pic. That's what I'd be looking at. But hey, it's your Jeep. The best part is whatever you get will be right (for you).
Depends on what you want them for? If you want real protection against rocks, frame mounter rails are not going to do it. The get pushed up into the tub. If you are looking for a step that is something a little different, well I guess they fit the bill. They are a bit stronger than tube side steps.