I returned this watch. I give Casio a lot of credit for designing these when nothing else like them existed. True innovators, indeed. But all those divisions and ridges on the screen create shadows, however subtle, and affect legibility, especially for anyone with less than perfect eyesight. A much better design - whether from Casio or Armitron - is a screen without or with fewer divisions. It's not Casio's fault that my eyesight is poor, but it should be a design consideration.