The house is very nice as the other guests mention - however two things are not clear from the listing:
1) The experience is more like a stay in a hostel (albeit a very nice one) than private house. It is very noisy and hard to control that within the house (loud heavy doors and old noisy staircase). You can hear noise whereever it is throughout the house i.e. if someone is making breakfast or showering in the basement, you can hear it on the top floor. Additonally, whilst the shared balcony is very nice it is directly outside this room (5) so there is very little privacy in the room while other guests are using the balcony (can see directly in through the windows.
2) The location in general is also loud. It is next to a very busy street. The noise from the traffic is constant with single glazing, and there are other noises from the neighbourhood.
Maria seems very nice and easy to communicate with. She was particularly helpful in assiting with me checking in and having some packages delivered. However as far as I can tell from my four week stay, she does not come to the house itself and that means there is very little accountability from the guests themselves. Some are very considerate, others less so.