No problem with music, but I think you will struggle to get Google or Apple maps to display on the infotainment screen, if that is what you are hoping.
I had a look at doing this a while back, on my Mk3, and decided to just mount my iPhone (from the CD slot) and use Apple maps and Google on the phone screen.
Will be interested in what other replies you get as I haven't tried for a while and I may be missing out.