Garmin Modern still won't sync scheduled training plan workouts to my 310XT properly.
It did for a while, but hey Garmin "updated" (read "broke") it.
It does sync custom workouts that I create in the calendar.
It used to work with Classic, but getting to Classic now seems to have been removed.
Lots of people on the forum have the same issues and still no resolution or admission that there's a problem.
When it comes time replace my watch I won't ever buy Garmin again.
No problems with the watch but the software is junk and support is worse than useless.
Disillusioned former Garmin customer and now detractor.