The car pick-up process was quick, but it's very far from Melbourne Airport! On the day of return, the keys got locked inside the car. When I called the rental company's phone number, they refused to assist. I had to seek help from the local tracking system, and a service person came to unlock the car! I can only say that the rental company is completely irresponsible in such incidents; it was the local tracking system department that was helpful, providing free service and taking no charge!