sensor is easy to install and use, once you realise that you need to take the battery out and back in for the mode you want, and it will flash blue or red.Quick and easy to setup and the garmin gets it first time. I lost a previous sensor on a ride so attached it with a cable tie this time. So my advice is to make a better instruction leaflet or better still a youtube link and add advice to secure it with a cable tie each time.
Hooked up the cadence and heart rate sensors so easily and switched on the computer and away we go. Having an issue linking to Strava but no big deal.
After receiving the sensor I sent it on to a friend abroad as a gift. I haven't heard of any negative problems with the sensor.
Easy to install but it seems to give inaccurate readings on speed and mileage. My Coospo ride was off by 2 miles compared to my Strava. I used the wheel codes in the provided instructions. I used it for mountain biking