Andrea's apartment was amazing, ample, very centric and very comfortable, we really enjoyed our stay. Just a couple things for future guests to take into consideration:
There are quite a bit of stairs, no elevator.
The dryer didn't work very well, so if you want to wash clothes count on extra time for them to dry naturally.
If you want to watch TV, connecting your laptop to the TV is, in our opinion, the best choice, the smart box doesn't work quite that well.
Other than that, we really really loved our stay, Andrea, Sibille and Nicolai were really helpful and the flat is stunning!