Product ReviewsFollowing reviews were written by actual customers.
Every GPS4US customer has a chance to live a feedback after receiving a product.

by Talmadge M, , 9/8/2016
Bought sensor for more accurate mileage on the trail while mountain biking. Unfortunately, the Garmin sensors are affected by either the magnetic field produced by disc brakes OR rough trail conditions. Mileage reads way long now as opposed to way short. Others have observed same per Garmin forums. Do NOT recommend for mountain biking.

by Daniel B, , 8/13/2016
Sensor works very well. Much better than the magnet sensor I had before.