The airbag vests are good. They are worn by the big boys in the moto gp purely because they are so good. Leather saves your skin, pads save you bruises, and with these your soft tissue injuries to the neck and torso are almost mitigated. They are also helpful with joint and bone injuries, as they stiffen certain areas so that your limbs don't get whiplashed if they grip the pavement when they should slide.

On the controlled surface of a racetrack, these are a godsend. Obviously on the street, nothing is going to save you from some of the hazards around, like vertical surfaces in the shape of mailboxes, street signs, or nearby cars, but overall they are still able to improve your chances.