Just took a long trip using Waze/in car nav. In Nashville, Waze had no idea how to get to a starbucks I had programmed in. I found a parking lot, searched for starbucks near me, and it found one, in Atlanta! Overall both Waze and in car did a good job, missing probably 20% of the time. But 20% is completely unacceptable if they were steering. I had snow in DC area, which I am skeptical self-drive works acceptably. Numerous construction areas, again problematic. I got a feeling self drive is going to be like voice recognition was in the 80's, just around the corner, for another 25 years. Even now, I'm not sure I'd trust voice recognition if my life depended on it.