When picking up the car, the fuel tank was not full. The display showed a range of 758 kilometers. When returning at the airport with a full tank, it showed a range of 800 kilometers. The car's exterior was not cleaned, and there was trash by the seat inside. The wipers did not clean the windshield properly. The steering wheel was too light, the brakes were too heavy, acceleration was slow, and the buttons inside the car were not user-friendly, making it feel like an airplane cockpit. The car's GPS failed to locate the current position all day, showing as being in Alaska, and there was never any response when calling the rental office at Calgary Airport. Despite having already bought the highest level of insurance on the rental platform, AVIS staff pressured me to buy additional insurance, warning that even a small scratch would cost 1000 CAD. This was by far my worst car rental experience ever!