Dearest, Not sure if you have purchased your AIR INTEGRATED dive computer or chose to go with the WRIST dive computer. There seems to be so many choices. From above, it seems you were planning to take on that decision, and go with the dive computer that tracks AIR in its logbook. Great choice. The above model, and any other dive computer has a logbook that can or should be downloadable onto a laptop/desktop computer, using proper software. You can check that. Just ask if there is a USB downloadable option. Just imagine that! Hassel free way to keep track of your dive experience. Make sure you INITIALIZE your dive computer, and set it accordingly for different AIR and WATER element. This way, you can take advantage of the dive computer tracking as you progress from DIVE #1 to DIVE #50, and going forward. All the metrics ( your data stored on the dive computer - from PSI used, depth TEMP, depth FEET, dive time, SIT time, etc. ) are extremely valuable indicators of your scuba diving performance. Of course, the dive computer can become your "buddy" as it beeps during your dive ( as you program it for warning signals.) Later, as you get better, your metrics will improve, and the computer will show that improvement. Imagine that! Yes, newer models of dive computers also allow charts to be displayed on your laptop/desktop. Funny? No way! Charts are great tools to learn about your dive performance. Also, the AIR INTEGRATED dive computer will add premium comfort in collecting these data points while you enjoy your diving experience. At least, it did for me. I think if I started with a SPG in which I needed to jot down data oh, what a mess I would have made. First of all, remembering what was the starting PSI, how much SIT time between dives, and so on. Remembering data from a dive just takes away from the fun. Then, also being responsible to write such numbers down with wet hands, possibly with a wet pen or pencil. Not at all fun. Not at all a scuba vacation. Right? Of course, there are other data items you can add to your laptop/desktop logbook, once your dive has been downloaded. Things like - WEIGHT BELT pounds used, WET SUIT thickness, VISABILITY, etc. These are not at all paralysis by analysis metrics, nor was your question. I wondered the same things myself, in basic scuba. Dah!! I would like to add, if you get an AIR INTEGRATED dive computer, check if there is a setting for NITROX air. It will not be long for scuba enthusiasts like you to take the Nitrox course, become certified in this new form of breathing, and start programing it into your dive computer. So, rather than just having a dive computer that measures Ambient air, get one with Nitrox, too. In doing so, your dive computer will stay useful for you longer. You will not be exchanging it after just one year or two, for the next model. And, that is the real question. Let us face it ... How long will your dive computer last before you need an upgrade? Hum? At what point in time will you out grow this AIR INTEGRATED dive computer? No paralysis here. No such thing as a stupid question. Pete Raft