I just replaced the Ten/Comp, frt control arm, frt and rear sway bar bushings with the endlink kits. This didn't take much to do, but really made a difference in the handling. My bushings were stock with 211,000 miles and had gotten mushy. Car now handles firm but not jarring like my RX-7, just controlled. I think the sway bushings and endlinks made more of an effect than the other replacements. However this was not a simple unbolt and replace job. I had to shorten the metal center spacer that goes between the washers to get all the bushings to go in and bolt back on. I'd recommend this upgrade to anyone wanting a more updated, responsive ride. How about longevity? Anybody had this in for a while? Opie.