Very smooth process.

High efficiency, attentive service, helped with luggage adjustment.

The engine failed to start twice: The first time was the day after renting the car, in the parking garage of the exhibition hall, it would not start. I called, but both breakdown numbers on the car key were unreachable and automatically disconnected! I tried the phone number on the rental platform, and after several transfers and explaining the situation, we waited for about an hour for assistance. During this time, I kept trying to start the car. Shortly after the phone contact, it miraculously started. Due to our tight schedule, returning to the airport to exchange cars was not an option, so we agreed that if it happened again, we would stop using the car. Miraculously, after four days, on the last day, while on our way to the airport, we stopped at a gas station to fill up the tank before return. After refueling, the car wouldn't start again! Tried all the phone numbers on the key and the rental company number, but none worked. The rental platform's phone said they couldn't help and asked us to call the breakdown number. Rushing to catch a flight, after about forty minutes of attempting to start it, it worked again! The car had only around 7,000 kilometers and was a 2018 model, so it should have been in good condition, but it was definitely a problematic car! Originally rented a Volvo V40, but was told at pickup that it was upgraded to a Jeep Wrangler. I thought I was lucky, but later felt it was a trap! It was a scary experience!

The service staff was extremely rude and unfriendly during the car return process. Highly recommend adding Chinese service.

Hertz's overall service was terrible. We had to wait in line for more than half an hour at Frankfurt Airport to pick up the car, only to find out that their store's computer system and POS machine were both down. They said they needed to do a pre-authorization over the phone. After showing them three cards, they finally said it was successful. However, we received bank messages showing pre-authorization on all three cards. They provided incorrect parking information, making us search for the car for quite some time, and eventually, we got help from staff from another rental company to find the car on an upper level. When returning the car at the Frankfurt city center location, I requested a receipt and was told to come back the next day. When I went the next day, they said they would check immediately and to come back in 20 minutes. After waiting 20 minutes and returning, the counter staff had already left. A neighboring rental company employee said he received an emergency call and had to leave. We had to go back a third day and were presented with a bill over 600 euros higher than our booking. When we discussed the incorrect charges with the staff, they told us that they billed according to the computer records and advised us to call customer service. We had to fly back to our home country that day, so we could only handle the issue after returning. Overall, this was a terrible car rental experience.