The watch you linked has the 3159 module which really hits the sweet spot for features. You get radio sync, daylight savings, world clock, stop watch, 4 alarms, snooze, and countdown timer.

It is my beater watch but I end up wearing it more than any of my automatics. I keep my world time set to UTC which is great to have while digging through server logs. The alarms are nice. I use the countdown timer for pomodoro. Best part, it is always accurate and I never have to set it.

My only complaint is the backlight only stays on for 1.5 seconds.

There is a similar module with bluetooth, but I think the only feature you get is the ability to make the backlight last longer and to manage alarms.

Anyway, I highly suggest that one if you need to add a square to your collection. There are some better looking ones, I'm going to buy the all black, negative display one next. Searching gw-m5610bc should get you to it (but make sure you get the one with the radio. there's a cheaper all black one that doesn't have the 3159)