Works well with my Garmin 520 Plus. I have one on my indoor trainer bike and one on my outdoor road machine. Seeing the cadence numbers helps me get back up to speed when I get distracted or slack off. It's a great motivator for me, especially when coupled with power numbers.
I needed to replace my original sensor that had fallen off my crank and gotten smashed on the road. The new one integrated into my system with no problems.
Upgraded to this new Garmin Cadence sensor 2 as this new version has bluetooth which makes it compatible with Zwift. Works seamlessly with my Garmin Edge 1000 when riding outside and pairs quickly with Zwift for indoor training. I prefer this Garmin cadence sensor over the wahoo fitness as the Garmin provides a more accurate and consistent reading.