This is one phenomenal watch.  It is as tough as the G-Shocks, and it has a decidedly handsome look to it.  Receipt of the nightly time update has never failed, and I don't even take the watch off.  The compass is as accurate as it is advertised.  The barometric pressure function is always in the ballpark with the local report, and its way of showing the trend as constant, upward, or downward is commendable.  The tide and moon graphs are very accurate and valuable to folks like me who spend time on the beach and in the sea.  The instruction manual is straight forward, and the watch functions are marvelously intuitive.  The only downer is the altimeter.  I'd be as well off depending on a ouija board.  It's not a function I value, so I don't whine about it.  Fine job, Amazon and Casio.