I'm using it with igps bsc300..
Since the torque efficiency and pedaling smoothness values didn't show up, I checked and found out that you need to turn on an option in Garmin Edge.. There's no option to turn it on in the bsc300 sensor menu or Garmin Connect (it was there until Vector 3).. I borrowed a friend's Edge, connected it, turned it on, and then reconnected the bsc300 and it worked fine haha
It's curious if they intentionally blocked it..
