Nope, been running flawlessly for 3+ years now
Technically you could but not at the same time and you would have to wire in a relay circuit to flip between the two sources. Not worth it IMHO. Besides i only ever use this or CD anyways lol.
Good choice! That's exactly the way I did mine. Just cut the end off a nice quality 3.5 cable and wired it in. Didn't want to put a hole in my dash.Did this to my car today, except I decided to run the cable through to my armrest so I can put my phone in the top portion and have the cables hidden.
Thanks for the great guide!