Really, not that often. I am apparently a bit of a control freak, and I drive 70% country roads without traffic. Lol
Given this conversation, I did use AP this morning on a drive in. It went pretty well although the car veered into the unpaved shoulder twice, despite a solid yellow line, and the car 'recognizing' the lane markings (i.e., the appropriate lines were displayed in the interface) and it being a straight road. Car was steered back to the other side of the lane, and then righted itself. It *was* fun (other than the slight veering onto the soft shoulder). I might need to use it more over the next few days. Perhaps I am just in the habit of *not* using it and should be a little more open! It IS a great feature.