I love this watch, its my first and have been using it for my marathon training. The GPS is super accurate, and its been on point letting me know how my sleep is and how my body is ready for training. It hasn't failed me on that data yet. It is pricey, but the convenience for running and statistics is well worth it. I have my Garmin linked to my Runna and Strava, so I can start my workouts on my watch and it will upload them to Runna and Strava, making it super easy to use. The only issue I have with it, is theres a software bug, where the screen will glitch out. You have to restart your watch to fix it, but any recording you're doing will pause and resume once your watch reboots which is super nice!

up to mark product comparible battery life accuret stastic and other features also give right data