Three years Atomic Clock gone.  I have the Silvery ring black band version. I went to work about three months ago and noticed the time was completely a mess.  Pushed the button to sync and it just wouldn't work.  That was about three months ago now and it still won't work.  I manually set it and it has lost about a minute since.  All other functions work. It still keeps good time and once you wade through the complex manual setting instructions and manage to set everything you are still good to go.  I have loved the altimeter, in particular, aware of its limitations and used the compass to figure out, in general what way I was going and the barometric pressure warning can be very nice on Colorado mountains in the afternoons when the storms come.  It is a tough watch having taken many a crack on my wrist.  Well, maybe that contributed to the atomic clock issue but still good to go