I have the Firestone air bags and love them.
I also have a weight distributing hitch for my toy hauler, works well.
They both are useful but have nothing to do with each other, different purposes.
You may need both though.
Confused yet?
I use the air bags to bring the truck back to level with all the stuff I tend to carry with me in the truck.
Then the WD is adjusted to bring the truck back to level when the TH hauler, which has a very high tongue weight, is hooked up. You don't want to use the WD hitch to lift more than the trailer tongue weight, ie raise your overloaded truck.
I also have a weight distributing hitch for my toy hauler, works well.
They both are useful but have nothing to do with each other, different purposes.
You may need both though.
Confused yet?
I use the air bags to bring the truck back to level with all the stuff I tend to carry with me in the truck.
Then the WD is adjusted to bring the truck back to level when the TH hauler, which has a very high tongue weight, is hooked up. You don't want to use the WD hitch to lift more than the trailer tongue weight, ie raise your overloaded truck.