Been using mine for a week and quite like it.... few quirks...
Mighty text which I've used for ever, doesn't seem to sync so thats a miss
Android auto - the phone dialer goes made, instead of the phone screen staying blank it shows the dialer, and then on the incar radio, it refreshes and refresh before going to main screen and showing call details that show I have been on a call for millions of minutes.... which is odd.
But on balance a great device.