have mine for almost two months now. had some issues the first week with the watch freezing etc, but just required a firmware update. Since then i've had not issues (i use it for running, pool swim, open water swim, bike, gym and hiking). people on the forums are complaining about a lot of stuff gps related, but ive experienced none and believe you just need to set it up right (ive tested it time and time again against other devices). Altimeter and barometer got its own problems, but there you need to understand the limitations of this in any watch across the board.
