I bought this watch a couple years back, for the altitude, and barometric features. The altimeter worked better, after calibrating it and the barometer worked fine. THe actual time function was nice due to the size of the readout. After 2 months, i had to replace the battery. oh well 15 bucks. then another six months went by, and then another battery. shortly after 9 months or so, the watch stared to fall apart.. the compass would go hay-wire, and the altimeter started to become less accurate. overall, i would just buy an altimeter/barometer watch from casio next time.