USB on the dash, doesn't give you full integration. From what I heard from the dealer, the glovelbox kit gives you the ability to control from the steering wheel.
I was waiting for my free 3 month SAT subscription to expire before installing this. If you happen to get it installed anytime soon, let us know if it's worthwhile.
As I was purchasing mine, I was able to negotiate the remote starter and the side molding where at dealer cost with free installation, this was even after final price was negotiated. Just remember, until you sign those documents, you still have the upper hand.
Looking back, should of installed the IPOD integration instead of remote starter.