I have 30,000km on a ReadyLift 2.5" coil spacer on my 2011 Ram 1500 CC 4X4, and I have had nothing but great experiences. I don't beat my truck like a company mule, but I don't baby it, either. No suspension work except for a 4W alignment this spring, and I have no signs of the "death wobble" other talk about. I also don't run giant tires, and the worst roads I take are heavy washboard gravel fire roads - I don't mud or rock crawl. However, the pavement in my city (Winnipeg, the sweaty armpit of Canada) is terrible - even the main roads look like were hit with aerial bombing, so my suspension takes a beating on a daily basis.