This is the 2nd one of these watches I've owned. The first one still works but I broke the watch where the band attaches to it by catching it on something. So I bought another just like it. I don't have to relearn all new functions of a new watch. This watch keeps perfect time because of the satellite wave function automatically setting the time. The other functions (world time, timers, etc.) all are very useful at times. Easy to read and very simple controls.