If we are voting I think trhe "beeps" are one monstrous annoyance. Why just the prius? If the reverse beep was audible on the exterior of the car, "maybe" You would almost think that these machines were for first time drivers or arcade car drivers. Since the "gouge" does not work on my 2004 I wish I could find the "beeper" so wire could be cut! I don't think that this will ever sound normal to me. I've had to live with it for six months and it doesn't get any better.