I have been using the Garmin 935 for a year and absolutely love it. While it was a little pricey it’s easy to use and the Garmin Connect iOS app is really helpful/useful as well. When I train I use the Garmin and the rest of the day I wear an Apple Watch. Both easily connect to MyFitnessPal to log my exercise for the day. When I run and bike I do use a Garmin HR strap as I found the HR monitor on the watch to be unreliable.