I wouldn't even give this service 1 star. The device constantly drains your battery. You can't leave your vehicle in -20 degree weather to let the battery charge or they charge you a $75 lockout fee. They tell you that you can put your device in a sleep mode, but mine either didn't have a sleep mode or it did not function. Customer service is exceptionally rude and will refuse to give back your money even if it is the fault of their device. When I had my device removed, they continued charging me their extremely high fees. I did have them on the phone with the service center on the day that I canceled and they are trying to tell me they didn't cancel it and are refusing to close out my account and stop taking my money.