I have a Ford Sync 2.5 system which is a cost reduced hardware downgrade from QNX based Sync 3. I'm sure the OS is doing its best while hobbled by a poor management decision but it has lots of bugs that crop up from what appears to be severe RAM shortage coupled with some gradual memory leaks. I have to reboot it regularly when traveling with Android auto. It's always a crap shoot if my phone will connect.