I have a gen2 and am very happy (and fitted myself so they must be relatively idiot proof!)
Couple of minor issues (not all directly related to the aucar unit) I have had were:
- Connecting a Huawei 4g dongle to the usb would just not work - kept opening a native app but wouldn't do anything - in the end I wired a female usb to the switched 12v supply and use a 4g WiFi dongle which with Waze works a treat
- The skip buttons on the steering wheel skips 2 tracks forward / back rather than 1 - I assume it's addressable in the settings but haven't bothered.
- I opted to turn on the setting that engages the parking sensors when speed is low. The sensors however appear to activate if a gnat farts. That said I can live with the false positives if it saves me at the right time (my garages are accessed by a narrow track)
- Can't change the in dash clock to 24hr
As a note I didn't bother routing the GPS antenna just left it affixed behind the dash and it works great
I am also impressed with the canbus integration even if some of the android options are 'vague' e.g. suspension open / close (doesn't toggle sport mode)
Any specific questions happy to answer.
Sprout