Overall service was smooth

Overall satisfied, especially with the patient explanation of various terms when picking up the car, and the good condition of the vehicle. I filled the tank before returning the car, but upon reaching the airport location, I noticed the fuel level was slightly below full. So, I went out again to top it up. Upon my second return, the staff did not inform me or give any hints and just printed a bill (I assume). I took it and went to the airport. At the airport, I discovered an additional charge of £7.62, presumably for the fuel shortage, apart from the usual rental fee and taxes. Calling them later, I found out their service time was over (after 18:00). I don't understand this practice, and maybe the staff was careless, but I am not satisfied with this outcome.

The service was excellent, the car was a 2014 model with 10,000 miles on it, clean and comfortable.

At the London Heathrow Airport branch, I was received by a lady who informed me that I had reserved a hybrid car (which is more expensive). I told her that was not the case. After typing on her computer, she realized she had made a mistake due to a name match. She then asked how many kilometers I planned to drive, and I responded that I thought the rental was unlimited mileage. She mentioned that based on my mileage, they could offer a discount on fuel, but I insisted on returning the car with a full tank. She then printed the documents for me to sign. I requested to verify each item and noted that there was an additional charge for super insurance, which I had already purchased through QEEQ, and it was clearly stated on the reservation not to upsell insurance. I pointed this out to her, and after some more typing, she reprinted the documents and retrieved the original ones. After picking up the car, I noticed that the inspection form indicated the car ran on diesel, but it was an Audi A3. Doubtful, I asked a security guard who politely suggested I smell the fuel tank, which confirmed gasoline. He double-checked with a colleague and confirmed that the document was incorrect. This was my first time renting from HERTZ and I hope this was just a one-time mistake.

The line at the London airport branch was very slow that day, and the Google navigation was inaccurate, which made me anxious when I couldn't find the drop-off point. Finally, I asked a local taxi driver and found it. The staff was nice, nothing unpleasant happened. It wasn't until my deposit was released today that I felt confident giving a fair review. 4 stars, it's okay.