I just returned my 9” unit to Hansshow. The audio routing was buggy - music comes out of Tesla speakers, Siri comes out of the Hansshow tinny little speaker and/or phone calls have terrible echo. They talked me through a bunch of nonsense things to try to get it working, then they told me “the engineer is working on the fix” (twice) but it turned out that wasn’t true. Then they tried to convince me to keep it by offering some money ($50) - but I was done with it. The unit has now been returned to them, waiting to see if they will actually issue the refund, I’ll update this thread with the result. I am more satisfied with the CarLinkit T2C.