After nothing but excellent hassle free service from the Air Lift kits I'd installed in my previous two trucks, opted for Air Lift 1000 bags when I got the Ram two years ago. While a bitch to slide into the springs, worked well n did exactly what I was expecting. Fast forward to late last winter, slow leak started in one bag (individual fill so easy to monitor which one) which progressed into holds air for a few minutes only, basically useless now (cracks in bag itself). Good news, called Air Lift n told no problem they have a lifetime warranty, hell yes. Downside, need to somehow remove the bag "without damaging it", ship back to them on my dime, wait for them to inspect, if ok'd pay for shipping back. If you do the math against a new single bag (even with your labor being free), that basically translates into your on your own.