I want to drive 120 until I tell the car not to any more. If I have to set the thing every two minutes, it's not that huge of an improvement over having to keep

I want to drive 120 until I tell the car not to any more. If I have to set the thing every two minutes, it's not that huge of an improvement over having to keep my foot at an awkward angle, unless I'm driving far enough for that to cause real pain.