He will give a better personal review seeing I dont have airbags but from a general overview I can help...
Airbags are usually used for trucks that have big loads, like an F-350 as a ranch truck or a toy hauler type truck. The airbags would aid in getting rid of that "so cal lean." Us Rancho/tuff country lifted guys use them just to aid in getting rid of the sagging we have without any load. A nicer ride comes with that too. Personally I love the air bag thought, If I was to do it I would want to add a tank so I could have on the fly adjustments. The only reason I stayed away from the bags is that I feel the rancho springs were inadequate to begin with and seeing I can get the deavers for a little bit more then the rancho spring packs I thought why not.