Which TT generation do you have?
I've got a DUD7 in my Mk2 TT with bose.
They sent me the AU03 dash kit and wiring with a Raize can box.
As far as audio - I didn't need any new wiring It was easy to get working. Pretty happy with it.
Haven't gotten around to tpms or 360.
I did have a small issue with ground loop noise when the haldex pump would run, but a ground loop isolator got that to decent levels.
The other issue I'm having is Raize can box not recognizing when I'm in reverse, so I'm still troubleshooting that.
I've got a 2.5 Mk2 with a manual though so auto might not have that issue.