You are asking the wrong guy ha ha , I am not a fan at all !! , Whilst i can see the attraction of levelling a camper on a field , the 6000 pound advantage stops there . The VB air system isnt showing long term reliability and the shocks in the kit aren't great so the ride is very average and cant be set low for normal driving .
The yellow Bilstein shocks would be better than the VB air BUT yellow Bilsteins are notoriously firm as they are hi pressure gas as well .
My money will always be on conventional quality systems.
We get great results and remember ride quality comes from the shock , So replacing a conventional Steel spring with an air bag doesnt improve ride at all , but gives flexibility on ride height only !!