Arny, I bought the React as my first computer, and loved it while diving. I dive with a watch for total time and backup with the tables, so I don't have to worry about switching between screens to get time on, say, a safety stop as some people above mentioned. I put the React in a console with a compass and psi guage, but I may end up trying it on my wrist opposite the watch to reduce "bulk". Since the React allows Nitrox, you can exapnd your abilities without expanding your budget. I never felt like the React was robbing me of bottom time, although I have yet to take it below about 60 fsw. All in all, a good computer for the money (and one that will not confuse the heck out of you). Just remember, the computer DOES NOT replace your brain while diving!!