i personaly use "sidewinder" because its nice, has an auto start feature that if u hit a button it'll start up and warm up or cool off and if u dont put the key in the ignition b4 15 mins it shuts off and it doesnt unlock your doors or anything when u auto-start. its not an easy establishment no matter what alarm it is so i'd look into having it professionaly done, also it has a sensitivity adjustment for EXREME sensitivity or it will just go off when your door is opened of broken into also features lock and unlock button and u can also program it to put your windows down when u unlock and put them up when u lock it
