This watch provides 5 basic functions: time, date, alarm clock, stopwatch, night lighting of the dial. The conditions for using in outdoor sports, I found him the advantage of being lightweight, flat, reduced surface without protrusions hanging fabrics. One can easily cover it with wool cuffs gloves in cold weather, and discover for operating the catches, even with triple glove thickness, not maneuvering conveniently with bigger gear. Its lightness and thinness make her forget. The well-known fragility of the plastic bracelets that break Casio regularly to the fold caused by repeated closures and unwinding (average life time: 1 year) nevertheless has a workaround: stop removing his watch, simply, watertight blithely supporting showers and cramped making forget overnight. My only regret is that Casio more redo the old model "jogging", and even thinner profile, where the function buttons were barely protruding buttons on the top of the dial and not the side studs, and which remains for me the ultimate model. Let's say the W is the 59-1VX meillleure current approximation of this vintage masterpiece.