How does the Audi A7's park assist feature work?

I'm interested in the park assist feature on the Audi A7. How does it work and is it easy to use?

The park assist feature on the Audi A7 uses ultrasonic sensors to scan for suitable parking spaces and then automatically steers the car into the spot.

Once activated, the park assist feature will guide you into a parallel or perpendicular parking space, while you control the acceleration and braking.

Audi's park assist feature also includes a parking aid, providing visual and audible signals to help you park safely and accurately.