I have had the Air Lift brand on 3 trucks now and never had a problem -- I did the install myself on this latest truck and it's not tough to do, plus you do a better job than the installers will...

With that said, I've looked over the Firestone bag system after installing this last set of Air Lifts, and I must say I think they are of superior design, so if I were to do it again, I'd go with the Firestones (they use metal air fittings and heavier duty air lines for example).

I found the best price from Summit Racing, btw...

Good luck!