Reviewed by Gavan Burden - 27th Jan, 2021 You're worth it! I upgraded from another "fitness" brand because I wanted accurate data and I've not been disappointed. GPS is bang on when measured vs OS maps (and phone); heart rate is exactly the same as BP machine (and phone); you can calibrate it to match your treadmill. Battery life is about 4 days with all the services switched on and doing 5 mile walks a day. I don't have large wrists and found the strap a bit short, but Garmin sent another FoC. It syncs well with the Connect app that provides an array of data. All in all, it's been a great motivator and data provider for me. Pleased I splashed out.