The car traveled around 15 miles on highways, surface streets, and even a roundabout. But many questions remain about the stunt.

The feat was performed by a Tesla Model Y on Friday, with the electric-car maker posting a video (top) of the car’s journey, which used Tesla’s driver-assist Full Self-Driving (FSD) system to reach its destination.

Tesla has completed what it says is the world’s first fully autonomous delivery of a vehicle, with a Model Y driving itself from the company’s Gigafactory in Austin to a customer’s home about 30 minutes away — without a driver or remote operator.