I went for my first run with my new 645 (non-music version) last night. I switched to Garmin because of terrible compatibility between the Map My Run app and my Apple Watch, which Under Armor knows about, but apparently has no interest in fixing. Last night I ran a very well-defined route that I have run countless times before. The total mileage for the route is just over six miles. Imagine the sinking feeling in my gut when I looked at my watch after finishing my run, only to find that the 645 indicated that I only ran 1.84 miles! I looked at the map that was generated, and there it is...I started on my street (although apparently the watch didn't wake up and start recording anything until I was almost to the end of my block), and then the run terminates 13 minutes later, 1.84 miles away. According to the watch, I never even made it home!
So what gives? Did I buy a lemon? Should I return the 645 now and look at other brands? Very disappointing to not even get one single run in before the watch malfunctions.