In keeping with the title of this thread, I just drove about 300 miles with AP2 in X (not the latest smooth updated). 90% with it on. Was uneventful. Just worked fine. I did turn off during construction points. And a couple of times after construction where the road was just paved and just little dots where there. (Though it still seemed to be tracking things, I played it safe). Still so much nicer than driving manually.