I don't know how long it has been since you have heard any concerns with the coilovers but any problems that arose I believe were addressed. The main concern was always noise not ride quality. The Pro Comp Coilovers are a definent improvement on the factory ride. The noise that was being created by the lack of poly/rubber in the shock was the problem and once it was amplified by the coil itself I think it was a bit too much "race inspired" for some people. I know Pro Comp stood behind those coilovers and rebuilt the ones with problems. They also ofter custom type rebuilds for a pretty decent price if it comes down to it.