Raphaela and her husband reacted very quickly on my message, so a booking was quickly made.
The apartment is located quite central at an 8 minutes walk from train station Wien Mitte. I checked in late and still got a quick tour: the newness and cleanliness of the place were remarkable.
The hosts live in the neighboring house, so it's easy to quickly ask a question.
To conclude: great and friendly hosts, nice and big apartment, beautiful city!