1. Never trust returning a car outside business hours. Europecar in Barcelona is extremely terrible. 20 days after returning a car, I was charged again for a damaged air compressor. How unreasonable! It's unfair to blame the previous renter for internal damages after such a long time. Another car had scratches when picked up; I reported it and took photos as evidence, yet I was charged for repairs. 2. QEEQ is powerless for complaints. I provided photos and evidence to QEEQ but still no result after more than a month, just endless patience waiting. I've given up and turned to insurance claims. 3. Always get full insurance. If any issue arises, European car rental companies will shirk responsibility, QEEQ is useless, and losses can't be recovered.