Do not use firefly at reus Barcelona airport. I hired a car for a week on a full to full fuel policy. It wasn't cheap. returned the car to the airport firefly desk and was told there were no charges. I got home and found that they had taken 46 euros from credit card for refuelling the car. It was for 8 euros of fuel according to them the rest admin charges. I filled the car up to the brim just outside the airport. This is a scam and after contacting rentalcars.com who were useless I'm out of pocket and there is nothing I can do about it. Beware!