Rating: - Design flaw
When placing the sensor, it turns out that there is too much tilt towards the crank. After one bump on the road, or hitting it with my road shoe, the arm of the sensor moved and the spokes hit it and broke it off. I am now on my second sensor.
Rating: - Garmin Forerunner 305 Speed/cadence sensor
It was a little touchy getting it set up, just getting the pick-ups in the right place and close enough. I haven't had a chance to use it outdoors yet but on the trainer it works great.
Rating: - Garmin Cadence Sensor
Great addition to anyone whom already has a Garmin compatible watch! Easy to use, install, and connect. I have no other products/experience with other biking computers but I couldn't imagine them being any easier than this. Provides great feedback on cadence, speed, etc.
Rating: - works better second time around
The item is fine and quality outstanding however shape is not "modernized" with the trends in aluminum-formed chain stays. So the first one I bought disappeared but the second time around I was able to secure it better and keep it going better. I'm happy.