We spent about 2 weeks here. The apartment is comfortable and a good size for a couple.
The building is old and it may not look great from the outside, but inside, the apartment is modern and clean. The place looks like in the photos, including the nice balcony view over the plaza.
Good wifi, and it was nice to have a good washing machine right there in the apartment.
The plaza is noisy, even at night. However, the central location means there is plenty of shopping, cafes, etc, nearby, and it is easy to get to anyplace else in the city.
The hosts are very good - we encountered a problem one night, and we received immediate and helpful response. Also, the conserjes (porters) of the building are nice and they very kindly helped us with our bags when we left.