Bushing detereoration can cause excessive tire wear, braking instability, and poor handling. This is the single biggest reason you can instantly tell the difference driving a three year old car and a new one.
Powerflex bushings offer much more effective control of the suspension components in your vehicle, and are a massive upgrade from typical rubber components.
By correctly engineering the polyurethane compound, Powerflex bushings can be made 25-30% stiffer than new rubber items but with exactly the same noise absorbing properties.