Toad ai606 is about as good as you can get. If someone wants to break in, they can smash glass, so locks are fine. The alarm will alert you to any form of entry. The immobilised fuel pump and starter will stop anyone hotwiring it in a hurry. You can add a tilt sensor to the toad to alert of any car movement. Leave nothing on display, prevention is better than cure. If someone really wants to nick it, they will, via tow truck, hiab, etc.. I also have a hidden fuel pump switch fitted before the toad was installed, but its still there incase a half clever thief has time to figure out the wiring!