Both my wife and I have these to connect to our Garmin 520+ computers. They are easy to mount on a wheel and the cranks, and it is easy to adjust the location if you find yourself hitting the cadence sensor with your stroke.
These are great for trainer use, giving you interesting data when you have to ride in place. Meanwhile, if you have to load your bike for a drive for a ride, the speed sensor is a bother. It will register each walk from house to car as a ride, and post that amazing data to strava. Took it off after getting kudos on one too many .39 mile rides.
These work well, but I didn't ask for clunky-looking items to mount on my crank arms and hubs. Why did Garmin discontinue the dual sensor that mounted neatly on the chain stay. Probably because all of those that I owned eventually failed. All they needed to do was update the housing and seal it better.
This combo was really easy to set up and use. The only issue was the mounting system for the speed sensor. The bands aren't long enough to accommodate an internally geared hub but I was able to add an additional band I had. Using it on my recumbent on an older trainer to add some stats for motivation. Easy to pair with my phone and Garmin vivoactive 3 watch once you get the hang of it.
I installed the new speed sensors on my new carbon wheel set. It is a much safer and easier installation from the older style sensor, which actually damaged my carbon rim. It installs very easily as well.
The sensors work every time with no hassle. Easy to mount. Just sync to your head unit the first time and use them. And there's the bonus of moving them from bicycle to bicycle as well.
Iï¿½m gradually winding my way into the new century with my first wireless Garmin setup, and Iï¿½ve been accumulating various widgets to that end. I have these paired to a little Garmin Edge 25 and it works fine. I also have a Varia 2 in the mix and it all works. The only caveat is that I have to start riding before I turn on the Head unit and it then recognizes all 3 devices.
With all of my stay-mounted Garmin dual sensors now failed, this is the only Garmin option. I wish these weren't so bulky and ugly. They work fine and can be easily transferred. Garmin should repair or replace the dual sensor parts instead of keep making more electronic waste.