I got this because a heavier Casio watch that I had tended to leave marks on my wrist. This one is very light and comfy. It seems a bit small, but acceptable. The only things it lacks are a month indicator (but I think I can remember what month it is) and time zones (but I don't travel abroad much). I looked at getting a slightly larger Casio watch but the thing that stopped me is that the example I have seems to keep perfect time. I set it against an internet clock and after several weeks it is still accurate to the second.
13/4/13 Correction it doesn't keep perfect time, but since 24 June it has only gained a fraction of a second.