Why not get a LowJack for $600 and forget having your alarm computer tell people to move away from the the vehicle? The built in alarm should work just fine for routine purposes. I can tell you the open door thing works fine ever since my kids set it off when I left them in the car while I went into the store. I wondered what the big smiles were all about when I got back. If some guy wants to steal my car, I am not about to confront him anyway, so the key chip and built in alarm should do the trick. The LowJack allows the cops to at least recover the car. They might even catch the perp.