We really enjoyed the stay in this apartment. The apartment is located near plaza mayor so very central, the check-in was well organized and the host responded very quickly to my messages. I also appreciated the large window area that allowed us to let in some sunlight during the day which cannot be taken for granted in Madrid's apartments. During the night it can get a little loud because of e.g. cars driving by. Even though the apartment is provided with a heating unit, it can get a little cold in the winter (I was there in december) which might be the downside of having a large window area; it did not bother me too much but it might be something you might want to take into account if you are sensitive to cold. Overall, I'm really happy with the stay and would return to this apartment.