If you are serious about being and even if you use Strava or other similar GPS based apps to track your ride, this device is a serious addition to your biking experience. While you may not use all the data like calories or ride time, the speedometer and odometer are way more accurate than GPS based apps.
Things to watch out for:
1. Avoid theft by using zipties instead of rubber bands (both are provided in the package) and also because zipties give you a better grip
2. Keep very little distance (3mm) between the magnet and the sensor else you won't get a reading.
Once you do this, it works very well.
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Received the product on time and is working great.