Hi,
I have used endomondo premium for the past 8 years, the only feature keeping me from switching complete to Garmin Connect is the lack of Personal Best progress. In Endomondo you can see your weekly best 10km for example, this doesn't seem possible in Garmin Connect, you can just see your absolute best.
PR
Forerunner 110
Vivoactive 3 Music ciq.forums.garmin.com/.../1446946.jpg