it's supposed to be able to have additional features like tilt and glass but I didn't really look into it, I had the viper alarm installed like literally the next day after I bought the truck. no factory system will do what the viper will. the factory alarm is still enabled also, adding the viper system does not disable the factory alarm.
as for the other comment above about moving well I could live in bumfuck alaska 200 miles from anyone and I would still want a alarm that's just me I got tired of having my vehicles broken into, no where is safe anymore, I live in one of the best area's in my city, cars still get broken into and stolen every single day, doesn't matter where you live if someone want's what you have they will just take it if they can.