Instruct: Classify Amazon reviews into positive or negative sentiment
Query: GSC 10 Cadence Sensor

based on previous reviews of this product, I went ahead and changed the battery before even trying to install it.Installed it in tandem with my current wired cateye computer(used the cateye crank sensor, and just installed a second wheel magnet), worked on the first try with my FR 305...works great for capturing speed/cadence data on indoor trainer.