This is one gismo that I wouldn't want to use. When and at what speed
to turn on wipers doesn't just depend upon rainfall, it depends upon
traffic, splashes, cleanliness of the windshield, time of day, position
of the sun if it is out also, oncoming headlights and many other
factors. I think this is a very stupid idea since the visibility
problem is right in front of your eyes and the control is at your finger
tip.
On the other hand, I use cruise control constantly, even on back roads
and some city streets. It is my way of not getting speeding tickets.
I set my speed to a safe speed below where they start giving tickets and
let it control. The fastest way to get between two points is to
accelerate quickly to just below the enforcement level and stay there.
Cruise is the best way to do this.