Overall impression? Was it worth the wait?
For my very limited, sleepy run: yes, with a couple of caveats.
First, I don't trust autosteer at all on surface streets, at least for now. It almost ran me into the median after crossing an intersection.
Second, autosteer seems to want to take an exit once in a while instead of staying in the lane that would keep you on the highway (even with Nav engaged,
Lastly, the "nag" feature that tells you to "hold the steering wheel" seems pretty aggressive - it seemed like every 1 minute, and after about 2 minutes of ignoring it the car started to slow down.
Much more testing to be done obviously, but autosteer seems to work well. As for the user interface, we definitely lost some details, information, and precision of information (e.g. power meter ticks).