Pretty good, although there was a bit of a surprise, they provided a free cushion to solve the problem

It was okay

Due to flight issues, I didn't arrive on time and the reserved car was no longer available. I had to switch to a compact model or pay extra.

They didn't notify me in advance that the reserved model was not available, which is not user-friendly.

I booked an Audi A4 wagon, but they gave me a Mercedes E220 wagon instead. Very satisfied! Picking up the car was just a matter of completing the paperwork at the counter and following the staff's instructions to get the car myself. Returning the car was even simpler: I handed over the keys at the counter, was asked if the tank was full, and was told everything was fine without them even checking the car. I picked up the car 2 hours early and returned it 1 hour late. No problem. Germans are so trusting and accommodating. Highly commendable!