Gps-Web offers the lowest operating cost in the industry. The GPS-Web is competitvely priced. Optional installation kits for instant magnetic mounting on vehicle. Other systems require over 1 hour installation time. Traditional GPS antennas must be mounted in the vehicle where they will have a clear view of the sky, unobstructed by any metal.
Some systems require cellular phone bills.
Real time or historical location information. Many systems cannot store location history. The GPS-Web PT2 can be set up to send you unique messages triggered by breaking glass, activated alarms, panic buttons, etc. The other brands are larger, heavier, and more difficult to conceal.