inputs.text: not understand bad reviews - many bad reviews makes wonder competitors wrote thehem using watch year think great takes 30 seconds get gps lock new firmware firmware update would take minute first bought took forever bought watch week came big watch knew bought altimeter joke run beach along water line low tide stay elevation maybe 2 feet waves come check graphs later shows 25 foot change guess gps based altitude sensors not work well not understand feature distance speed pace etc work great overall think gps technology still pretty new figure 510 years kinks worked use global trainer great no real annoyances