Overall, I am very satisfied.

Arrived at the counter at 7:30 AM but was not allowed to pick up the car early; they strictly adhere to the pickup time. Although the office usually closes at 9 PM, we returned the car at 8:30 PM the night before. The inspection staff were not available, so we were told to leave the keys in the box. However, there have been no issues so far.

It turned out to be Europcar. There were cheaper options with other small rental companies, but I chose a big brand to avoid hidden fees. However, it was the same! At the counter, I explicitly told them I didn't need insurance as I had purchased it domestically. The representative smiled and agreed. Later, she said she upgraded our car for free but never mentioned we would be charged for it. In the end, we received a bill for thousands, including upgrade and insurance fees!

Top customer service at Hannover airport.

car rental company charges airport service fees and climate protection fees although according to easyrentcars.com all fees are included.