The communication with Fosca was very good, she responded very quickly and was very helpful. I didn´t have the chance to meet her personally, but she arranged everything smoothly with the help of her friends. I really appreciated her tips for places to see and cafe/restaurants. It was very nice. The location is perfect - not only because the metro station is very close, but there are many places/museums/churches in the walking distance. The appartment is small, suitable for 1 person (as indicated).
Nevertheless, I have one objection - next to the flat is a hotel which is currently under reconstruction. I woke every morning on the sound of jackhammers which was very uncomfortable.