I purchased this watch on a Cruise a couple years ago. I've literally never changed the time once since buying it and it has kept the exact time within the minute (only the date was incorrect). It has never once ran out of battery power or stopped for whatever reason. I've not tested its water resistance so I cannot attest to that but If you are looking for a stylish watch worth the money this is it. Ive owned many watches over the years and this one has never given me one problem. Oh yeah and it never needs a battery.