They did not notify me of the violation in time. After one day, they directly deducted the service fee and the fine without permission. This is very upsetting.

The queue was very long.

It's advisable to buy car insurance when you rent the car, as it is more expensive if you purchase it upon picking up the car in London. Also, it's not recommended to buy fuel when picking up the car (80 pounds) unless you are only driving in London, as fuel is cheaper outside of London.

When we went to pick up the car, they didn't provide the model we booked. They claimed that the model we booked was too small and asked us to pay an extra £760 for a larger car. When we refused, they made things difficult for us and delayed us for 2 hours before finally giving us a car.

Hertz is located a bit far, but there's a shuttle bus which helps. I came from Terminal 5, the queue was short in the morning, and I got the car quickly. The service was alright, but they recommended too many things. You need to say No to everything, especially when they emphasize that fuel prices are cheaper than the market. If you ask whether you can get a refund for any leftover fuel, they say no. I almost got fooled. It's hard to return the car with an empty tank precisely. Also, after getting the car, carefully check its condition. I found a few scratches that weren't noted in the inspection report, so you need to inform them yourself.