So the wife and daughter both have iphones and of course they both want to use them in the truck (2008 yukon xl denali). Yes there using the aux port on the front for now, but am looking for something more permanent and user friendly . I was leaning toward the lockpic 550 as I also want to get something to unlock the other features as well, but have been reading alot of negative stuff about there product and customer service. So was just wondering who uses what and if your happy with it. As of right now I'm looking at the nav-tv barracuda for the umlock features, Thanks