Also take note on the car that you drive. Despite what the tracking companies advertise, they are not all compatible with all cars. Especially with the newer models. When I bought my car in 2010, my insurance company forced me to install a tracking device, but VW warned me that if it is a wired system, warranty will not cover any issues that arise from wiring. The technician then took me to the back to show me a brand new Scirocco that only had a tracking device installed (Tracker or Netstar... can't remember which one). The car was back due to major issues to the wiring and the bill was thousands of rands. Don't know if these guys have improved since then, but I'll never go for a system like that again.
Also, these wired systems can eat away at your car's battery. Before my current car, I drove a Golf 5 and had a Netstar installed. I think in the 4 years that I owned the car, I've had to replace the battery twice. Thus the car used 3 batteries in 4 years.
For my current car I finally got the Tracetec which has no wires, it is cheap and it has its own battery that lasts 3 years, after which they will give you a new device (free of charge I think). Not a problem for me though as I generally avoid driving a car outside of warranty.
Also, these wired systems can eat away at your car's battery. Before my current car, I drove a Golf 5 and had a Netstar installed. I think in the 4 years that I owned the car, I've had to replace the battery twice. Thus the car used 3 batteries in 4 years.
For my current car I finally got the Tracetec which has no wires, it is cheap and it has its own battery that lasts 3 years, after which they will give you a new device (free of charge I think). Not a problem for me though as I generally avoid driving a car outside of warranty.