Precision is the same as the Polar belts. The benchmark was quite surprising. The battery runs out of easily fits 3-4 weeks. Using the GPS consumes battery rather quickly ... it takes about 2-3 races up ... (3x30 min run). The capture of the GPS signal varies between 5 and 30 seconds depending on the location. The treadmill and swimming modes are perfect. Very easy job. In case of doubt, the videos are on YouTube. The only downside, the charging system ... I forgot my charger base before a long trip ... so I'd watch an unusable. Standardization of recharging mode would be welcome ... style a live recharging the watch to a USB port (like Nike watch).
