First car had multiple stains on the passenger seat. The window had a streak of paint on it. We reported the issues and they wrote them down as pre-existing. As we prepared to leave, the cars warning lights signaled low tire pressure. That was significant enough that we had to report the car again. They politely issued us a second car at no charge. The second car had temporary tags though.
A second rental car customer also had to report stains in his car.
A third customer had to report a large crack in his windshield.
When we returned to drop off the car - hours before the schedule end time - the Sixt employee unexpectedly gave us the wrong receipt for another person. It had their home address and start time of rental. At first we reported it and they said it was because it was a replacement car. They said it was okay and told us it was fine since we had a receipt.
But we had to specifically ask them to correct the receipt so we had proof we returned our car... He just wrote our name on the wrong receipt and crossed off the other persons name. Other people were waiting so we left to board the shuttle. However I realized not only was the name and car wrong , but the start date of the rental was wrong too!
Upon further inspection, we discovered the receipt did not list the same car. It had another registration number for the wrong car again. We had to leave the shuttle, delaying passengers. We asked them to look us up again. Apparently they thought we had called to request an extra day and we again had to correct them. Our pickup receipt clearly stated the car and rental period.
So, we were glad to have a receipt with our name on it and the proper date of return. But it still listed the contract dates incorrectly even though we had reserved everything online and had printed out a copy of the online receipt....
I'm not sure what's up with the company's record tracking system but be careful. We would have taken a dirty, unserviced/damaged car, and would have been incorrectly billed for an extra day had we not read the receipts carefully...! We received another customers home information which should be private and not released to other customers. Will never use them again. Unprofessional to say the least...!