i have 2 piezos in my honda as well, im actaully scared to enter the car. i forgot my remote at a friends house and had no choice, trust me i would haev to be the theif that gets into your car if u had that. The best place to hide the unit is in center consol. Most of my installs the main unit is hidden in center consol below radio. It uses a hell lot more wire but no1 can get to it. I tap power off the deck and @ ignition so power cutoff is hard to do. "no car is 100% theft proof" yes that is correct, u can prevent it almost 100% if u want to put the money out. That includes top dollar alarm system, sirens, tilt sensor, proximity/microwave sensor. glass breakage sensor, fuel cut off, starter kill, ignition kill. nothing is impossible. i would hate to be the persont aht has to install that for you ahaha. Would take FOREVER and a milion diodes for all ur sensors.