the only thing that can go wrong is getting the polarity wrong...some cars have positive and negitive polarity..but if u get it installed they wont get it wrong. a good alarm is basically clifford, presiege whihc i like. look to spend 150 plus for an alarm and stay away from viper, code, karr etc. i can actually disable a viper myself. just get a trunk, and hood trigger, and make sure they secure the brain thats in the car. tell them to try and hide the horn and hook it up to ur car horn so if someone brakes into ur car and cuts the siren horn, the car horn will still go off...may cost extra but its ur car