I WOULD HAVE GIVEN THIS A FIVE STAR RATING BUT I BELIEVE THE LAST STAR IS GIVEN FOR LONGEVITY REASONS....  IT WORKS, AND THE WATCHES ARE KEEPING TIME AT A VERY REASONABLE PRICE. FOR THAT I GIVE IT A SOLID FOUR STARS.... IF IT LASTS ME A YEAR OR MORE IT WOULD CERTAINLY GIVE IT A FIVE STAR RATING ESPECIALLY SINCE MANY AUTO WINDERS ARE AS EXPENSIVE AND ONLY WIND ONE OR TWO WATCHES.  SO FAR, SO GOOD.