I'm running the readylift 2.5" torsion keys with rancho 5000 series shocks.
What the key does is re-index your factory torsion bar "start" setting thereby achieving the lift without cranking your bars.
This allows future adjustment as well if one day you decide to add a bull guard with winch on the front. You still have room to adjust the bars up to compensate for the extra weight.
As for the ride - I like it. Feels more like a truck and was even better after
removing the sway bars.