The warning about NOT leaving the auto-wipers on during a run through a car-wash tunnel, about the (recent) battery drainage, about the extra cost of the "auto" option made me decide against it in the first place: too easy to forget about it once used to its convenience may lead to costly damage(s).
So, I did not opt for the option to start with. Less things to worry about. I switch the lights/wipers on when needed, and am happy with this easy and traditional solution.
