Picked up the car in Madrid; the originally booked Volkswagen Touran was replaced with a Fiat diesel car. I'm not sure if this was an upgrade. The diesel car is slower to accelerate. The pick-up location was decent. However, the drop-off in Granada was on a Sunday. It never occurred to me, nor did anyone inform me, that the store would be closed on Sundays. As a result, I couldn't find the drop-off location and there was no attendant. Fortunately, a very kind local helped me by calling the Madrid store to inquire about the drop-off details, then accompanied me to the designated parking area and showed me where to drop the keys into the box at the store entrance. Since they pre-charged me for a full tank of fuel at pick-up, I contacted the rental company's customer service multiple times via email. Luckily, when I returned to Shanghai, I saw that the bank only deducted the car rental fee.