Airbags- built in air compressor or manual fill?

I love gadgets. If you have plenty of money and like gadgets get one for sure. But for air bags you don't need it. Might come in handy for airing up a tire. When I use to have them I would put on the TC and pump them up to where I wanted them and that was it. They are good for leveling the load. There certainly are other options. I have used timbrens and now lower stableloads from Torklyft. I like both of these products. Cheap and work well.