Heck, i'm 26 and nowhere near overweight, but the fact that I'm not in greatest cardiovascular health of my life right now troubles me.
You make me feel guilty, I am in my middle thirties and in the best shape of my life.
Anyways, I have my Cobra and although the other divers in the shop are trying to get me to invest in a wireless TX for my Vytec and ditch the Cobra, I will rely on the Cobra as I don't trust wireless TX around metal (ie. shipwrecks) or the batteries on the transmitter not to go out for that matter.
I bought the Cobra for my initial computer and I am glad that I did. And to the crowd that believes the AI is a crutch, I look at the actual pressure, not the time left. That changes anyways whenever I change depth.