What problem are you trying to solve with the air2? Why do you think it is a better setup than the traditional PADI setup or the vastly superior necklaced secondary, long hose primary setup?
i prefer standard long hose configuration. The air2 style inflators have a lot of failure points which I don't like, plus they require special LP hoses which are annoying if the hose fails, you have to borrow/rent a regulator, or even if you borrow/rent a BC with your personal reg set. Which inflators have you used that you didn't like? The standard ones on the plates/wings are all super easy to use and comfortable to hold on to. The Scubapro ones suck imho, as do most of the recreational ones.
=evil
=slightly less annoying
=best imho
What do you think about Atomic AI power inflators?