Had a situation happen a few days ago. Was driving down the center of town when the car in front of me came to a fast and sudden stop. Because of the sun at that time I did not notice. My Prime all of a sudden came to a fast stop as well with the bells and large BRAKE alert. The car stopped with a couple feet to spare hitting the car in front of me but everything in the back came forward. So it was a hard test but the system worked and I avoided an accident. Thank you safety features.