Unfortunately the photos do not correspond to reality. The rooms are much smaller and everything seems to be very old and a little bit damaged. Beds are super hard and in most of the rooms there are no windows. We only stayed for one night, so it wasn't a big problem for us. Also, the windows of the only room with a balcony were very thin. Next to the appartment is a club, you can imagine how loud it is during the night. Then, Flavia changed the location of our appartments 2 times, which was not very professional.
Nevertheless, Flavia was very friendly and responded very quickly to our messages. She also let us stay longer the day of departure so that we could spend more time in Madrid not carrying around our luggages.
However, I would not book this appartment again.