They force you to buy additional insurance, otherwise they won't allow you to cross the border. The crossing fee is only 25 EUR, but the insurance costs 66 EUR plus tax, which altogether cost an extra 120 EUR. I booked a C-class but got an X1 instead, which is clearly not the same class in China. Maybe in Germany, X1 has the same price as C-class. I've had a good impression of Hertz before, but this experience was very disappointing. The staff refused to mediate over the phone with the booking agency. It was really frustrating. If I weren't in a hurry, I would've canceled the rental. Do not choose this company.

Out of nowhere, they requested some number, and even after calling the car rental customer service, they couldn't figure out what number it was. It took more than half an hour without providing any number before the rental was completed. I still don't understand the whole situation!

Overall, it was pretty good. However, I was later unexpectedly charged multiple times without clear explanations. It's probably for some traffic violations, but there should at least be some sort of explanatory email. The bank couldn't provide any details.

The Hertz rental counter at Frankfurt Airport is very prominent, and the staff are enthusiastic. They held the Bus for us even though our flight was delayed. The procedures are simple.

Timely pickup, excellent service, and easy car exchange