it was a great watch and although the locking mechanism didn't work properly - didn't "lock" on my wrist I felt it was secure enough. The problem was that it worked for about two weeks and then stopped. I found I had to keep resetting it and eventually traced it to the store Revane referred me to. I was told to put him under a lamp for 24 hours. I left it there for 48 hours and it seemed to help. But after two weeks it stopped. I put it on the windowsill in the blazing sun for a week and time just seemed to fly by. Then they stopped and now. because I was in the hospital for a while. too late to get a refund.