Several things guys!
You should know that here Maria is letting TWO rooms. One is, I think, as described on the listing: 'Big Light Room'. The other, however, is Small and Dark... and it is Not described in the listing!
I thought I will be in (and paid) for a Big and Light Room.
However, Maria put me in the small one!
I did not complain because I did not want to create problems for her.
However, if this happens to you, you must complain within 72 hours and get 10 euro back for every day of your stay.
Another thing is that my girl-friend decided in the last moment to come to Berlin and join me for the last three days of my stay. Maria saw her and became very agitated and angry. Then she demanded, through airbnb, 20 additional euro for each of the three days of her stay...
This was not cool... especially given all other facts....
Definitely I will never visit this place of Maria again or anyone administered by her...