After initial difficulties during the initial assembly of the sensor works perfectly. For me it has then it works: Sensor on the rear - mount hub, only now turn on the Garmin Edge 800 and still rotate the rear wheel during start-up. All previous experiments with battery -. Bend the exchange and contacts brought nothing.
+ Lightweight, easy and quick to assemble. + On the hub well protected and clean look. + So far very reliable in operation + Problems even for a plurality of wheels to use.