currently using radiostar 2 way alarm....used it for about 3 yrs...ok lah not bad...car status on remote gives a peace of mind
only thing is that the remote is quite power hungry
like what others have suggested, a fuel cut switch is easy to make, and is a very cheap but effective solution
where u park the car is also important
i tinted my car gold, during day time if ppl wanna see inside it is quite difficult unless u go and take a really close look
if i have to park my car outside at night, id pull up my handbrake tight, turn the wheel to the side a bit and put it in 1st gear, just to make things a little bit harder if ppl wanna tow it. id put the front part facing the wall, close as well, so they can only tow the rear end, if they wanted to. at least there would be resistance due to the car being in gear. and since the wheels are not pointing straight, would it be wandering around if it was being towed? haha i donno but these things are what i do lah. driving a junk car but better be safe than sorry