A positive experience with customer service
Since all posts tend to just be negative :)
I completed a rental and returned the car to the same fuel level that I received it in. It was not 100%, it was like at the last tick before full. But I got charged for fuel. I had pictures of the dash before and after and I had my gas receipt and everything ready to show all the proof. I got on the phone with customer service - and navigating through the AI to get to a human wasn't even that much of a pain - and he didn't ask for anything. He just said okay we'll have the charge reversed, and so it was within like 4 business days.