Expensive toy, at best.
My network time-keeper checks in on ntp.org once a week (and is accurate to under a quarter of a second every six months). The rest of the kit take clock from that box daily. It's close enough for government work, so it's close enough for me. My weather gear also checks ntp.org regularly, as does the telco kit that keeps my cell phone's clock accurate.
I don't wear a watch. I can see the time from nearly everywhere, these days.