Bontrager's Interchange ANT+ Cadence Sensor is a cadence sensor that wirelessly transmits your data to a variety of ANT+ enabled receiving devices including Bontrager Node computers (sold separately). It includes a 5mm crank cadence band magnet and a silicone mounting strap to fit most chainstays, making installation a snap.
I've used this cadence sensor for the last 6 months and have had absolutely no trouble. Very easy to install (I would recommend using zip ties to attach it to your chainstay vs. the rubber band provided in the kit). Look closely and you will see two slots to use very small zip ties. You will need to remove your left pedal (remember that the left pedal has left hand threads). 5 to 10 minute install time and very reliable. I use mine with both a Garmin 500 and a Garmin 810, as I didn't like the giant arm on the Garmin cadence sensor. I didn't check the box on how it would work on a mountain bike, as I don't own one. I'm sure it would work fine.
Bottom LineYes, I would recommend this to a friend