well just one of the things is if you close the door after 30seconds the alarm arms, even if your keys are in the ignition, it doesnt lock the doors but soon as you open the door alarm goes off. might not sound a bad thing but you wont understand how much you actuly shut your door without the need of locking it unless you have the alarm. and at any car show thers always alarms going off but the one that goes off the most is this one!lol