I have been looking for something like this for a while now. 2 rear usbs let me keep my ipod connected in the glove box and the other to charge my iphone when needed. using the XM is great and the bluetooth is pretty good. Haven't played with the HD radio much and I'm having a hard time figuring out how to store presets, but I haven't read the manual yet either. I originally bought the 84oobh and returned it to get the dual usb and the overall look is better IMHO comparing the two.