There was only one staff member at the office, which was shared by three car rental companies. It wasn't hard to find, and the waiting time was about 15 minutes. There was no excessive upselling; they only re-confirmed whether I was crossing borders and the driver's age. The process was simple, but I had some doubts because you had to swipe the deposit before seeing the contract. However, the deposit was refunded quickly (within 1-2 days after returning the car) and the final charges only included toll fees, young driver fees, and extra road assistance insurance. Both renting and returning the car were self-service. After getting the key, you inspect the car yourself before driving off. When returning, you can take photos of the car for your own records (this is optional), and either drop the keys in a box or hand them to a staff member.