Efficient and simple.

When picking up the car, I was informed that my reserved model was unavailable, and then they recommended more expensive models. This seems to be a common tactic nowadays.

Service was great, almost no need to queue.

At London airport, there is a shuttle to the office. Just wait at the bus stop, very convenient

Extremely convenient for pick-up and return.

When I went to pick up the car, they said the reserved model wasn't available and asked me to upgrade. I insisted that I had a reservation and asked them to check the parking lot. Eventually, they gave me the reserved model. I had already purchased full insurance, but they still added windshield insurance and other coverages, costing me 30% more. I used self-service return, and the next day I went back to get a receipt. They told me the computer was broken and couldn't process it. I left my email address and asked them to send me the receipt, but a week has passed and I still haven't received it.