I'm in the market for a watch. Turned 41, my weight has slowly crept up despite working out 4-5 times a week - not too bad, like not obese. My cholesterol is bad partially due to genetics but mostly due to diet. I also have a mild sleep apnea, especially when my weight is high. I'm focusing on dropping weight this year and would love to start tracking sleep, recovery, apnea, and any heart issues before/as they happen. I do not want another screen though and though I've looked at the Apple watch multiple times, I've not actually purchased it yet.
I don't believe the Garmin tracks apnea signals or heart issues at all unfortunately