I have used "AIR LIFT" products on my last two trucks. They were an easy install and ran about $100 less than the Firestone product. If you hold them side by side, there isn't much difference in design and quality. I have never felt the need for an on-board compressor as it doubles the price of the unit, and is something else that can break. Since I only change the pressure in the airbags when towing, I'm only messing with them maybe once a month for five minutes or less. I have friends who have the Firestone brand and are happy with them. None of them use the on-board compressor.