Use the search function and look at what the general sentiment on the RC lifts are from actual users on the forum. I don't have nor have I experienced this, but the opinions are pretty strong on these lifts. I would tell you straight out, but I don't want to ruin your surprise or ruin the plot to your reading.
Save your money and look at BDS, OME or Rubicon Express. You get what you pay for in a lift kit no matter what height and the RC is rough in a YJ and have from time to time had some issues. I bought my RC lift through Morris 4X4 and they handled my warranty issues right away no questions asked just sent pics of a sagging leaf spring. New one on the doorstep 3 days later.
The ride quality and long lasting arched springs is what you are looking for. And yes I know how much a good kit costs and you really only want to do this mod once.
Unless you are on an extremely tight budget, avoid RC. I got the RC 2.5 when I was 15 because I was on a tight budget and wanted the immeidate satisfaction. Worst decision I made on the jeep. It lifted more than 2.5" which led to other necesary changes that I hadnt planned on needing, and it rides like crap. Flex is ok, but I would highly recommend getting a different lift.
I have a 2.5 RC lift of my 93 YJ with 31 stt's and I like it. Its my DD and i haven't really ran into to many issues with the lift, the issues i am having are with the rust. Yea it rides a little ruff, but my mom drove it for a winter and never complained once about it.