Having owned a COSC watch for a few years, I am disappointed in the number of times it has had to go back for attention of one sort or another. Good time keeping one would expect to be an essential. Unfortunately this watch has proved to be a poor performer and to date not capable of correct calibration after repeated returns for adjustment. The process for sending it back and the methodoogy for conveying the watch securely is all perfect. The guarantee is always honoured unfortunately the watch has not become an accurate time keeper yet !!!!! lets hope this time.