Most of us have to get on the interstate to get back home. They have been around for a long time and everything I have heard about them has been good. They require no maintenance. You are locked into that height forever. The traditional spring set-up however can be adjusted to any height at any time.
Parts are everywhere and anyone can do it.
The older Jeeps which had greasable bolts, which were greased on a regular basis, survive to this day. We replace the nylon bushings, which come with the axle, with bronze bushings and we replace the standard bolts with greasable bolts. We also replace the standard washers with stainless-steel. Simply grease them regularly and they will last forever. For best performance you have to go with the Torflex.