After hearing about a few cars being stolen , I have decided to order a tracking device for my car . All our company cars have them and it is amazing how well they work. I would rather get my car back in one piece and catch the little Pr@*ks. After hearing about a bob cat that was stolen and recovered 12 hours later after the police raided the property and caught the people involved, then this is the way to go . I have decided the one with the lithium battery back up is the way to go as it will still operate even with the car battery removed. The company is Fleetdynamics but want to know if anybody else has a different brand that they have used. I have been told that you can also shut the car down via the internet on the new model unit. It can be moved from car to car if you update your ride too.