Thanks for posting this. I often forget to breath when I'm diving, so certainly having a gizmo that squawks like a deranged chicken is just the thing. I also think a device that inflates my wing at 150' and rockets me to the surface will be awesome. Although as the Doc at a chamber I volunteered at used to say, "We can fix bent. We can't fix drowned".
I think something that they should work on would be an upgrade with a remote trigger. When you are forced to dive with an insta-buddy who turns out to be a real piece of work, you could just remotely trigger his device and enjoy the squawking chickens as he is whisked away to the surface and out of your life. (Back in the olden days, we used to do this by detonating an annoying buddies CO2 cartridge on his "vest". The only problem was that they failed about 80% of the time and even if they did detonate, there wasn't enough lift at depth to do much of anything. Kinda like farting in a drysuit...