I use it to keep track of my fitness progress over time mostly. I just got it set up a couple of months ago, so the verdict is still out as to how much I'll use it over time.

I just cloned the repo and configured it.

It's rather good and eye opening. It has exposed some needed changes to my sedentary habits.

This is the dashboard and project: https://grafana.com/grafana/dashboards/23245-garmin-stats/