I understand the point about the vehicle slowing without noticing, but after using it for a bit I mostly got used to it and learned at what point the car would start slowing. In some ways it is annoying, because it over reacts and uses the brakes quite a lot, which will also show up later in greatly reduced brake life, not to mention it's probably annoying to people following. I just started turning mine off under certain situations, such as going downhill, as I do not want the system riding the brakes constantly. Overall, I think it's a good system, but does have some limitations that you just have to adapt to.