I used the hard-wired FM modulator...crystal clear.....

Mounted the docking base in the tray on top of the dash, all the wires are hidden, looks very nice..

 

Thats what i have now but to me, the sound quality still isnt up to par. Its half that of regular radio. I just ordered the PIE unit that michigunman posted that powers it. The hardwired FM mod is much better than the wireless signal for sure...but it still lacks sound quality IMO