I use an Air 2 and also do not have an extremely long hose as my primary regulator. Me and the people I dive with have practiced buddy breathing and we have no problem. If you have to give them the primary and breathe off the Air 2 it works fine for recreational diving. I actually find it sometimes to be easier to breathe off of then the primary because there is no excess slack hangin garound it just curves around and it easy to breathe off of. You don't need to breathe and adjust your buoyancy at the same time, it's not that difficult. I suppose if you're a beginner it may be a little difficult, but you just take it out and inflate it or release air, then put it back in, you don't need to be breathing every second.