My husband’s work involves too much traveling and most of the time, to places that are really remote (since most of the cell sites are in far flung areas of the district). That is why when it comes to GPS Tracking, I would opt for a GPS device that is hidden and personal. At least that way, I know where my husband is going, and it would be easy to track him if ever he does something out of the ordinary (yeah right).
Aside from that, the fact that kids nowadays can somehow veer off the right road, this kind of tracking device is extremely important to somehow still know where they might be going, or at least have some clue of their vicinity (at least I’ll know if they’re really attending school).