The blind spot warning seems like that would be good-it isn’t beeping or honking at you all the time just driving down the road.
Auto bright lights is pretty cool too. I used to love having that on the floor where you could hit it with your foot. I always wondered why they got rid of it.
Of course, I never wondered why a company would charge a thousand dollars for it to simply unlock it.
Mine doesn't make any sound. It's just a light on each of the side mirrors that flashes when a lane change would be unsafe. I rarely need the mirrors anymore.