The additional fees are excessively expensive. The rental cost was only 300 euros, but the navigation system was 150 euros, which is too expensive. What I was unhappy about was the difficulty in returning the car. Due to the complicated road conditions at Charles de Gaulle Airport, the navigation didn't guide us correctly to the specific return point. We first drove the car to the underground garage of Terminal 2E and took the elevator up to the 2E rental car area. We asked the staff if they could accompany us to drive the car there because it was a short walking distance but a complicated driving route. However, the staff said no and told us to follow the ground rental car signs. We had no choice but to drive out of the parking lot, which had high parking fees. The rental car signs on the ground were also not very clear, with many intersections, making us go around in circles. We couldn't find the location and had to return the car at the 2D point. Although we could return it there, it was inconvenient as we had a lot of luggage and were flying out of 2E. Fortunately, a Cantonese-speaking staff member working there heard about our difficulty and got a French colleague to drive us to 2E. It only took five minutes following them. If it weren't for this staff member, we might have missed our flight. For such a simple matter, they were unwilling to provide any help. Their service is questionable. They are probably more patient while charging fees, but once the payment is made, there is no service to talk about.