Simon of E.
Staff were excellent; friendly and helpful. They also spoke English which was great.
Rented a BMW M2 and was pleasantly surprised to find that the car was actually an M2 Competition upon pickup.
The car was clean and in excellent condition. I have driven cars directly from BMW in the past and the vehicle was presented to the same standard.
Overall a very good experience, I highly recommend Sixt Düsseldorf.