Darius had problems with the rod end links failing after less than 15000 miles. He wrote about it here.
If you're happy, that is great.
The design is inferior to OEM in terms of durability and longevity. The engineering is substandard to OEM.
You get header clearance and a steering rack but aside from that, it will not last like a OEM based suspension.
Cantilevered tie rod ends?
Coil over springs placing all suspension loads into the frame rails instead of at the torsion bar crossmember?
Thin lower control arms with inadequate shear resistance?
No aftermarket suspension shows an advantage in durability or racing lap times compared to a OEM based system.
For a show pony that will never see 20,000 miles in the entire time you own it, the RMS stuff may be fine.
They do look pretty.
Rich Ehrenberg has railed against the RMS, Magnum Farce and other systems that use coil overs. I don't always agree with the guy but he made a very convincing argument against these setups.
One myth that buyers fall victim to is the belief that the car performs so much better with the new system in place.
Well, a shiny paint job on the car looks better than the 53 year old car with original paint too.
Compare a RMS equipped car to one with a stock based arrangement and see if the hype holds up.
I'm talking a car with larger torsion bars, offset upper control arm bushings or aftermarket UCAs entirely, a bigger sway bar and decent shocks. Add in a Borgeson steering box to round it out. There you have factory durability, ease of finding replacement parts when you need them and excellent road and track manners for far less money.
The factory stuff doesn't look as pretty though.