Has anyone been able to figure out how trailer stability assist works exactly? I can't seem to find it in either the eyesight or regular owner's manual. Not that I can say trailer sway has ever been much of an issue pulling our popup camper with our forester, but I am curious how it interacts with a brake controller, if at all, on the Ascent. It if it doesn't, I don't really see how it would work other than accelerating the car to pull a trailer out of sway. I much prefer the method of using the manual brake arm of the controller (on prodigy models at least) to brake the trailer and end the sway by applying the trailer brakes independent of the car brakes. But it would definitely be good to have some sensor to do that instead of having to rely on the driver to notice trailer sway in the rear or side view mirrors.