Easy enough to set up, came with an extra battery (need 2, came with 3). I'm using it on a bike set up on an indoor trainer, so the front wheel doesn't spin. Had to get creative to mount the sensor on the back wheel, as the distance between where I could mount the sensor and where the magnet is on the spokes was too far. I used a few layers of double-sided foam tape to mount the sensor so it sat close enough to the spokes. Even with the sensor & magnet on the back wheel, the computer portion picks up the info fine from the handlebars.
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