He's overnighting me a pair of Aeris Atmos AIs (the same, exact computer Larry dives with); gave me the OK to dive with the darwins if I so choose, but yeah, I think based on the button function and further discussion on how it works, I'd rather just grab what he's using. He did recommend the Aeris Atmos 2 as the least expensive next best option to the Darwin; but I think at this point I'd rather just go with all the neat bells and whistles and enjoy the data it provides. I likely won't bother diving with the darwin.