To be honest, my experience with Sixt has been flawless so far. This is my third time renting a car with them and everything went perfectly. Dagna, at the front office, she was super helpful and attentive, which you definitely do not expect from somebody on a Sunday morning at 07:00AM.
In addition, given that the car we booked was not available, we got an upgrade to a much nicer car, an Audi SQ7 SUV, with a 507hp V8 engine, which was more than enough to cruise around the German alps during our trip. The car itself was in pristine condition.
Both key pick up and return were super smooth and fast, just as the release of the deposit and the post rental car check. In case you return the car late at night when there’s no personnel, the key return box seems to have sort of a sensor that detects keys and we got email confirmation a few minutes after, which is reassuring and not all car rentals have this system.
Another very helpful thing to bear in mind is that just outside the car park there’s a 24h petrol station, which makes things easy upon return.
All in all, I would definitely recommend this office.