Android Headunit experience?

We just bought an A6 Allroad 3.0BiTDI from 2013.
We come from a VW Touran with an Android head unit, so now we are missing a lot of functions.
Have any of you experience with an Android Headunit in this car?
And is it possible to keep the navi in the dashboard and in the HUD?
Have any of you tried it?
Kind regards
from Denmark.



