alarm for z viper 5902

im89

im looking into getting the 5902 with tilt sensor. a shop quoted me $570 for install with lifetime warranty. What are somethings i need check out before letting them do it. they installed an amp, sub, and tints in my old altima and i never had any problems. Any questions i should ask to make sure the install if going to be done right. i read in a thread after the install make sure all your windows work. just want to know if there is anything else i should know before i hand my car over to them. main reason for the alarm is i don't want my rims to get stolen(have wheel locks) had an altima with g37 rims and they broke of one of my wheel locks while i was parked. just want a little more security but dont want to mess my car up because of install. any recommendation on another alarm or shop i live in ozone park ny would be appreciated to. thanks.