But, my observation is that 99% of the time, it does just as you say. It will fairly reliably take you from point A to B. However, there's that nagging 1% where the car tries to kill you in stupendous ways. It doesn't happen most trips and you have to react quick when it happens.
For example, I've had the car not identify another vehicle and pull out in front of it (forcing me to hammer the accelerator). I've had it try and rapidly switch lanes ultimately cutting off people (I have it set to "chill" driving). I've had it not realize when lanes end or that it's in a turn only lane, forcing me to intervene and take the only legal move.
For Highway/interstate driving, it's pretty flawless now. For city driving, I'm definitely a lot more on guard.