Product is used to track my exercise during the day and sleep during the night. The GPS is a good additional feature and compares well with tracking results from Strava. This is my fourth unit since 2015. So, product is not durable, probably not designed to be so, which is understandable. My last Charge 3 only lasted 18 months. Strap is not very robust and not very durable. Had to buy three replacement straps from PRC online since 2015.