I have 2 mobile GPS tracking devices. I have only recently have had some updating issues so Iâ€™m hoping itâ€™s just a system glitch that will be quickly corrected, however aside from this they have performed magnificently. I wish the battery life was longer or maybe resistant to weather (extreme cold). But câ€™est la vie, they are just electronics. And the pinpoint accuracy is the MOST REWARDING part of these devices.