The GPS-102-B Mini GPS Tracker is a solid and accurate GPS tracker option. It is one of the few trackers in our lineup that relies on sending text message alerts with longitudinal coordinates and timestamps. Most of the other products in our lineup give you an online account where you can track your child or pet in real time and view the tracking history with assigned coordinates. This limited functionality means it is not suitable for everyone, but it is also less expensive and very easy to use compared to some of the other products we reviewed.