The Garmin underestimates my calorie burn on the Cross Trainer. My Cross Trainer is a Kesier M5 but doesn't have a bluetooth wattmeter so it can't remote telemetry straight to the watch.
At the end of a session I type in the calories burnt from the X Trainer computer into Garmin's activity via "edit". However, even though the calories burnt are stored correctly in the activity, it doesn't update the calories burnt during the day.
I wouldn't mind if it was a small amount but the Garmin is underestimating my burn by >25%.