I have got company fitted multimedia in my city aspire. This system isn't user friendly in any area, no matters you are using navigation or playing dvd. I am unable to run songs using usb or sd. So, my only choice is to use music through my iphone after connecting with cable that is built-in or using cd/dvd. Finding address from navigation is itself a task. So, I am agree with madhouse12 to use branded player and garmin device. Because, right now Apple isn't jumped into the car systems