What a beautiful piece of work by Seiko. I'm tired of replacing batteries and this technology seems as good as the eco drive by Citizen. I just had an expensive $350 pilot watch ruined by someone replacing the battery and not re-setting it correctly. Getting older and don't need all the fine detail anymore, and this watch just has that comfortable "right" feel to it....very solid....and yet you can view the movement through the translucent bottom.  This will be my main timepiece from now on for every occasion.