I installed this complete system , we needed to replace 1 of the CRE 3000 due to a bad bushing so I went ahead and changed everything to the Roadmaster complete suspension kit (with shocks). I added 2 MORyde X-Factor braces as well (front and rear hangers). We've had the rig out about 9000 miles or so since the change.
There were ride improvements over the bridge transitions and rougher roads, pot holes, etc... we noticed a faster recovery of the bounce, The RV didn't seem to drag or "jerk" the truck as much when it was going over some of these like it did with the factory suspension. This system seems to handle the rough roads better than the factory suspension. The RV and all of our "stuff" doesn't seem to get beat up and bounced around like it used to. We also installed the Gen-Y pinbox at the same time. Best thing next to the independent suspension system (that was just not in the price rage for us). No regrets, I'd do it again if we buy another without the IS.
I made this change after a suggestion from the folks at Affinity last year. I needed the suspension repair and was looking at different options, discussed it with the Affinity team while I was picking the rig after having the frame flex repairs done. I'm not regretting it. I ordered all the parts through E-trailer, it does need longer U-Bolts, factory size are just a bit short to be comfortable. I did do the install myself on a Saturday.