I have the VKS Prerunner sliders on my 2 door. Completely bolt on installations (well, with a lot of drilling) and they look great. I got some shit from friends (wheeling buddies) for not going with a weld on setup, which VKS also offers. Here's why;
-Yes, they aren't, in theory, as strong as a weld on setup, but I planned on using them. The ability to remove for paint/cleanup was important to me
-I didn't want anything in the way if future plans or directions change (Long arm, etc)
-Didn't want to spend time fuckin with the installation
I had some hesitations at first because of an improperly installed, similar set on a friends Jeep caused some flex and some damage. BUT, I've landed on mine hard, I've used them to pivot around stuff and I've used them to actually slide (V notch rock obstacle) and they have stood up and laughed it off. Plus they look great. I've seen no movement from them, they are securely tied to the FRAME (not the body, body mounts or some other witchcraft) and the design allows me to deflect off of stuff. Plus they slide really nice... same granite obstacle with VKS vs Stock, the stock actually took some work cause they were grabbing (as they deflected, bent, were a flat surface..) whereas the VKS glide across.
Two things don't worry me with my Jeep when I'm wheeling. I drive pretty cautiously and within my limits, but I don't care about smacking my Poison Spyder BFH front bumper and I don't care about landing on those sliders.