John, playing devils advocate
So you're at $600, currently $160 lower than the petrel.
Less gas mixes than the petrel. Screen is still casio watch style instead of LCD, uses N cell batteries which no one uses anymore instead of AA's, has to have USB upload instead of bluetooth, does have a flight tracker but not sure how useful that is in real life, can apparently switch between fresh/salt which is nice but again not sure of how useful it actually is. Not sure how the button layout is because you only show a frontal view, and the touchless gas switching is nifty, but not sure how useful in real life.
Real question is why would I sacrifice the infinitely better screen of the Petrel and now a digital compass for your computer?
Alternatively, why should I buy yours over say a Nitek Q at the same price point with a better screen, more gasses for technical diving, digital compass, and rechargeable battery?
Other alternative, same price, xDeep Black. Essentially same price, much nicer screen, digital compass, though you lose trimix at that price
Other alternative is save $50, go with a TX1 from Hollis which has more gasses, similar screen, digital compass, air integration, etc?
be very careful making claims like that when you are competing against some very powerful computers.... You are offering essentially two "gimmick" features in the salt/fresh auto switch *those computers are all programmable for fresh vs. salt and no harder to change than switching a gas mix*, and the flight tracker, but you're using a non-standard battery, don't have a depth compensating strap option, don't offer as many gas mixes for technical divers, and are playing in the same price ballpark and you are using a screen that is destroyed when you look at it next to a Petrel.
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Even if it had all of the features of the Petrel, I think everyone here would pay the extra $150 just for the screen....