I have bought several Casio watches over the last 20 years. I do not use the databank feature. The essential features I want are a 4 function calculator, an ability to illuminate the dial in the dark, 5 alarms, and to look as different from a Rolex as possible. And cheap enough to replace every 3 years or so. (Usually because the wristband wears out and it costs way too much to replace it if you can find a replacement at all.) The battery is supposed to be good for only 2 or 3 years but I have several old watches keeping perfect time after several years. Having the battery replaced usually destroys the waterproofing. The best price I have ever found was on Amazon.