Fenomenal battery life. Best wrist HR monitor on market. The app is a bit wonky, but I use Strava anyway and the build quality outruns Garmin by miles.
This is an amazing piece of technology. A lot of my friends run with Garmin watches but I have stayed loyal to polar over the years
I have only scratched the surface as to what it can do but would highly recommend it to anyone who needs to keep track of their activities
Does everything I need from a multi sport watch - pairs with my sensors, records accurately and without fail (within 1 bpm of my separate chest strap HR monitor) and battery lasts a week.