I`ve been diving for a year and right after getting my OW cert. I got an air integrated computer. I`m using an Oceanic VT3 and I really like it. Although I don`t have experience with other computers, I caught on quickly to it. It`s dive data is PC downloadable and is in a great format with tons of information that I`ve found helpful in understanding my dives after the fact. Like ascent rates, bouyancy, air consumption rates, etc. The Oceanic is supposed to use a conservative dive model to keep you from getting bent or from exposure to micro-bubbles. Even though the dive model is conservative I haven`t found that my dive time is any shorter just my ascent rates are more controlled. "DalelynnSims" makes some good points about redundancy. I`m am not redunadant with another computer, but I plan on getting one. Some people suggest having a small SPG for redundancy that you can tuck into your BC pocket if you are using an AirIntegrated computer and I may do that too.