Kiel, Hamburg, Göttingen, Harz Mountains, Kassel

The service attitude was good, and they didn't push us to buy insurance. Initially, they gave us a diesel car, but we requested a petrol one, and they changed it after letting us inspect it. When returning the car, the on-site inspector insisted that the fuel tank wasn't full, but the issue was quickly resolved after we spoke to the staff at the office. Overall, the service attitude was quite good.