Our stay was good.
Helena was waiting for us at the right time, when we arrived. She welcomed us and did her best to explain in details about the apartment. She is efficient and a very nice person. The communication with the host (Barbara) went just through whatsapp and mail.
The location of the apartment is excellent, can't be better. It is well equipped, renovated and clean . One of the rooms is in the basement and you have to go down about 10 stairs to get there. The second room is on the entrance (street level) and has a big glass façade that makes the room a bit noisy at night and early in the morning...
There is not much daylight and natural ventilation in the apartment.
The host is very obsessive about washing the dishes before you check out (otherwise you pay penalty, editorial to the cleaning fee you already paid!) but they don't provide you the means to do it (scotch-brite / brush /etc). we had to buy it.
Also when we arrived, we found the dishes not so clean as we expected.
To sum it up, the apartment is good and recommended.