I now have and use:
Garmin FR910xt
Garmn Edge 810.
Garmin FR620
And on my way to the store to pick up a vivofit.
My Edge 810 anf FR620 have not proven 100% reliable so i use my always working 910xt ass a backup when working out.
This ends up in my statistics getting messed up with many duplicate workouts.
I request garming connect to handle this and consider workouts done within the same timeframe to be considered one workout.
Best Regards.
Knut