The improperly working Pro-Plus 2 pressure sensor combined with a tank that didn't have the amount of pressure we thought it did resulted in an OOG situation. Fortunately we shared my air and got out of the situation unharmed. After that experience the Pro-Plus 2 was taken out of service, replaced with a SPG (her primary computer is a wrist mount) as well as my other buddy with the wireless transmitter (that would have intermittent connection issues) adding a normal SPG.