I have my returned because they went about almost 20 sec. Per day (!). About this shortcoming I could not ignore. In addition, I found not so great that the bracelet caused side expresses its unfavorable form in his arms, no matter how easy it is. Pointer does not glow in the dark to barely visible, the dashes. Lighting and second hand does not exist, you can let yourself seconds digital display.
Setting the clock via a button works like this: press the button and wait until the hands have turned into the correct position. The digital display is not synchronized with the hands, only the second (that is, the minute hand points exactly to the bottom line when seconds go to 0).
When the clock would be at least as accurate as is in the papers (30 sec. Per month), I would have kept in spite of all shortcomings.