I have the RC 2.5" lift. I does give a little rougher ride than stock, but with the tires I have, it was already a rougher ride than stock. Kit came with coil springs, shocks and transfer case drop. Oh yeah, it was only $299.
It did pull the axles a little off center and now my passenger side tire rubs the control arm a little at full right turn. Nothing that I am worried about. If I ever re-gear it for bigger tires I can add adjustable track bars to my list so that I can re-center the axles.