This watch does everything it's designed to do, performs all functions properly , it's incredibly amazing that it was capable to synchronize radio controlled time signal from US until South America! I couldn't believe that! It's lightweight, has titanium bracelet, solar powered, water resistant, all variables it measures are inside acceptable precision limits, most of functions are of intuitive handling but you've got to read manual for specifc functions mainly related to sensors. Imagine if it had a GPS sensor, it would be the perfect Casio device!.. Only one thing you must to do is find a watch maker or clock shop to adjust length of bracelet in professional way because it's too long for wrist, don't try to do that yourself because you can scratch the bracelet or break away one pin or damage the clasp......I fully recommend buy this watch at a worth price like it's offered in Amazon!