I've had the watch for about 2 years. Set the time to GPS time about a year ago and it is less than a second off. J810 movement is super accurate! The only issue and not really a big one, is the silicone band can easily slip out of the strap retainers and flap around while wearing it.
Very nice watch. Simple and comfortable would highly recommend
Bought this about a week ago and can not believe how nice this watch looks both casual and dressy casual. I wear it with suits or jeans and it’s nice