I have a Citizen Hyper Aqualand, and absolutely love it. While my primary computer is with my gear, I can complete my dive logs using the watch...back in the hotel, in the galley, etc.
The problem I had was with the ascent alarm. It's WAY to sensitive. I'd just move my arm and the thing would start beeping. I took it to a jewler, and he put a piece of tape over the spring that acts as the alarm. He said the could later remove it if I wanted the alarm to work again, but NO WAY. The Jewler didn't charge me anything, and he changed the battery for just over $5.00 while I waited (I don't recall the exact price).
The light could also be brighter.
But it's a nice looking watch that tracks all the information I use for my dive logs.
I don't recommend it for use as a primary computer for the same reasons others have stated.