I have a 2011 Sonata. Bluetooth works fine for incoming calls and playing Zune audio. Audio via YouTube doesn't work. Also, voice calling through the car's system does not work unless I have the phone hub open. Kind of a drag this function doesn't work fully considering my Pre - from 2009 had no issues in this regard.
I have a 2011 hyundai Sonata and my Arrive works perfectly with the car's blue tooth, voice calls, zune music, iheart radio, telenav all work great.