Will it have a decent heart rate sensor? I have a very expensive Garmin smartwatch, and the heart rate sensor is absolute shite. I mean it's pretty accurate on average during steady-state anything. But if you're doing any kind of interval training or weight lifting, the readings are often utter gibberish and completely inactionable.
Not only the heart rate sensors for most watches and fitness trackers bad, but these products have also made it so hard to find a good sensor as the search results are all dominated by the crappy ones.
Looking forward to seeing your progress.