Arrived at 9 AM and waited in line for an hour. Domestic orders require no deposit, but the company desk charged €645 on the credit card as a pre-authorization hold. Contacted QEEQ customer service for clarification.

Acceptable

Frankfurt International Airport is too large. We had to ask many people and went around twice before finding the return location. It would be best to provide the latitude and longitude coordinates of the return store for direct navigation.

The store counter was very easy to find, the procedures were simple and I got the car quickly. I was lucky to get a brand new car this time. However, there was a minor issue with the air conditioning breaking down halfway through, but it inexplicably fixed itself after half a day. I guess they don't use air conditioning much in Germany.