The best part of the apartment is the location only a couple of minutes walking from Puerto del Sol square. The apartment is in the backyard of the building. The good thing is there is no noise from the very busy street. On the other side the windows lead into a very tiny deep shaft so there is effectively no daylight at all coming into the apartment at ground level. You always have the impression it is nighttime like in a basement. The apartment is quite clairaudient so we heard noise from neighbors in the building also very late at night all days. The person who let us in was very helpfull but could not speak English so the check in was not that easy. The mattress looked new and was very comfortable. On the other side the kitchen is very poorly equipped (for example no wine glasses available).