I really like the Citizen Eco-Drive watch. It has an esthetically appealing design. It's both functional and attractive. The only detriment I can identify is that the mineral dial window scratches rather easily. For a non diver not a problem, but for someone who will dive using this watch it could be problematic. the mineral window appears a bit convex over the bezel. However, it polishes out very easily with toothpaste.
I've had mine for a year, prox 10 ocean dives and innumerable snorkel outings. All that said, I'd purchase it again in a heartbeat.

Update 2-13-2012. UPDATED WATCH WITH A METAL BAND. Installed a watchadoo 20 mm band and the watch looks awesome, both functionally and esthetically. Contact Frank at Watchadoo@yahoo.com for details. A picture of the watch with the band installed is available at [...] Now the Citizen Eco is complete.