I can understand the need that some people feel to make improvements to their cars, but....
Have these same people ever driven a well prepped Mopar with its stock based OEM design? I'm talking about a reinforced K member, boxed LCAs, subframe connectors, upgraded power steering chuck, bigger torsion bars and sway bars and top of the line shocks? For less than half the money, you can have OEM durability and great handling. Our cars were built to take a beating. The frame rails were designed to carry part of the suspension loads, not all of it. The torsion bar crossmember also carries part of the suspension load. Most of these aftermarket suspension setups place ALL of the loads on the two frame rails, then they fail to connect them in the same manner as OEM. The factory K member helps the frame rails to resist "parallellogramming". The aftermarket crossmembers do not.
My guess is that if people buy these kits and only drive them on smooth roads, they may be just fine. I seriously doubt that a RMS equipped car would be faster on a road course or dragstrip.
One of the benefits I hear is..."I love the header clearance." Well, TTI and Dougs offer great headers for most cars, even first gen A body cars. Another comment: "The steering feel is so much better." Better than a 100,000 mile car with worn out parts? Really ???
Again....try driving a stock based Mopar with upgraded parts. You might find that the engineers knew what they were doing .