Got my unit in today. Love it. My only gripe is that you can't change tracks in usb mode from the steering wheel while on the navi screen. I understand why it's like that, but if they fixed it in a future update the unit would be perfect (to me). Still worth every penny, though.
And for anyone thinking about installing a usb plug in the small tray behind the cupholders: put it as far forward in the tray as possible. I put it at the back and one of my sticks is too tall and hits the armrest. If I had put it forward it would have cleared.