This tracker with extended battery is the best one I have used so far. It's been a month and the battery is at 70%. The container that holds the device and battery has very strong magnets, so probability of the device falling off is very minimal. Activation was a less than a minute process if you already know which plan do you want. The frequency to ping GPS location be set to different intervals. Mine was set to 30 seconds, but the customer service is so prompt, Mervin from customer service helped me change the frequency remotely in just couple of mins. The user interface for web and mobile app is very intuitive. Last but not the least, geofencing and notifications on geofences is the best feature !