I had a 2004 f-150, I put the firestone bags on it. I now have a 2005 silverado 2500 with air lifts on it. They broke work equally as well. I did have to have the air lifts replace under warranty. Their customer service was great. Not sure what exactly happen to it, but one of the bags wouldn't hold air. I have also had the air lift bags much longer than the firestone.
2017 Wildcat 327RE
2005 Chevy Silverado
2016 Nights camped in wildcat(14) didn't count previous trailer
2017 Nights camped (44)
2018 Nights camped (29) that's too low. Must work on it.