I just got a Pro plus 2 to replace my 2001 pro plus which lasted for 16 years then started having battery issues. Oceanic gave me a deal on the replacement. Since the Pro Plus line is air integrated I have the functionality of a very expensive computer for a fraction of the price, I just have it on a hose. The “dive time remaining” feature that calculates your time based on which is the least: gas time, nitrogen time, or O2, is awesome. In the beginning it’s always gas consumption which is is brilliant, and yeah I fly that baby in open water rather than plan my gas because it works really well and me doing math—NOT so much. I know I should be doing some SAC rate calculation but on a heaving boat I can barely add 2+2. Yeah it’s a crutch. So is a regulator! Besides when you watch that thing it teaches you to breathe more efficiently... you can watch your estimated dive time climb! Or if you ascend you can see the gas lasting longer. What computers did for multi-level diving that feature also does for gas consumption. Do any other computers do that?