I had previously  purchased ~3 LaCrosse watches. These tune themselves nightly to WWVB/ Ft. Collins, Colorado to maintain ~exact time. While wall clocks purchased from LaCrosse work perfectly, the LCD display on the watches burned out in a direct sunlight in a year or two.  This Casio watch does not have that problem. and I am so far very pleased with it.

ADDED NOTE: Friend asked me tonight why I have watch when I carry a Droid Razr at all times. Many kids today do not have watches.

ANSWER: Takes me < 2sec to glance at watch and get time time to +/- 2 3 msec since unit resets itself nightly against WWVB in Fort Collins Colorado. [This is the National Bureau of Standards time signal used by all TV and radio stations.]  Grabbing my Droid out of its holster takes much longer, especially when I am wearing a jacket, and I then have to put it back.