I've got a 2013 Ford with the much derided Sync 2. Everything pretty much works, it's just the UX is really slow, and the colors aren't pretty. Also, inputs queue up which is weird with a touch screen. It adds up to infotainment being hard to use while driving, but the buttons pretty much work, and the radio stays off if it was off before turning off the car (if you were on Bluetooth before, and your phone isn't present when you start up again, it will try for a while and then fail back to radio, and if your bluetooth audio level is lower than radio, that could be loud... but bluetooth audio levels is a cross car issue)
Compared to my 2017 Chrysler which can't really turn off the radio, only mute it, which doesn't hold across start cycles, and refused to work with my wife's phone for 6 months (probably a Nokia Android firmware issue, because it stopped working with a phone update and started working again with a phone update, but it worked on the Ford the whole time), and the head unit has crashed while in motion a handful of times, the Ford isn't so bad.
But everything is terrible, and I look forward to a future where the phone does most of the work. Although, my (couple of years ago) experience with Android Auto is I'd rather use Android directly, and not let it know it's in a car.