I saw the Apocalypse at DEMA, and was pretty impressed. I also had a looong talk to Alex, who is clearly a bright cookie. I have a couple of questions, both to Alex (if you're around), and others who looked at the unit.
The electronics package is very nifty but a little confusing to me. IIRC, it's on the right shoulder, in the exhale side of the loop. That seems problematic to me - it seems a place that's particularly prone to getting wet with even a trivial amount of water in the loop. A big old mouthful would really not be pleasant for it. And surely hydrophobic membranes can't take a full onslaught of water?
Also, what do you all think of the idea that the readout is only available to the "buddy", i.e. the "joined at the hip" approach to diving? Seems highly unrealistic to expect a buddy to be THAT buddyish, and a key way to make diving unfun. Scootering is essentially out with this. And since it's on the right shoulder for both divers, one has to swim forwards and the other backwards just to watch each other's PO2. My backfinning sucks, making me wonder if that's going to have to be part of the training for the unit :) . I know there's voice annunciation, but that's another problem - since it's really hard to tell where sound comes from underwater, when a voice starts yelling at me, how do I know whether it's my unit or my buddy's? And what happened to the concept of "silent diving" - it's irritating enough having my GPS interrupt my radio programming, now my rebreather is going to do this too?
Overall I think there are some fantastic ideas for both safety and simplification of a rebreather. But the electronics setup just seems weird to me. I know a cord to a handset adds expense and complexity, but it seems that this system makes the unit half unusable, half infuriating.