I have the AVH-P4400BH I love the appradio my son can watch his youtube on it through the iphone, the Ipod function is a litlle laggy but whos iphone/ipod isnt when u have a ton of media on it. Motion X GPS is awesome with this HU. The crappy thing is after you buy the nav app you also have to pay a 25$ fee to have it unlocked to view on a pioneer HU that part sucked but other than that this HU is great!!!