I also have a Rough Country Lift on my YJ and am Very pleased w/ its performance. HOWEVER, the instructions that come w/ the kit SUK! Very vague, poorly illustrated and written. I think Mr. Teenie wrote them!
Anywhoo, the quality of the product is great, just find someone to help you that has experience installing lift on a YJ. Some things to keep in mind, loosen the tranny mounts when dropping the Tcase, Loosen the exhaust connections as these are also affected by Tcase drop and take the time to clean and paint the various parts of your jeep where you have removed stuff that is supposed to move so the rust doesn't have a head start on limiting the range or movement of the new parts as you want them to be able to flex easily for a quick break-in. Watch your shackle bolt torque on this as well. Paint the shocks w/ a good, quality rust resistant paint as my shocks are showing signs of being exposed and no longer white
Enjoy! And if you need anymore help, just let us know!