We have spent 2 nights in the apartment of Lina, everything was greatly coordinated, warm welcomed in person and with some nice and practical compliments.
The apartment is in one of those aristocratic and impressing buildings right in front of the Palacio Real (so it is one of the very central districts connected to everything else), even with some reconstructions in the street in our days - it was an impressive location in all the meanings. It is the very last floor that allow for the great view that is shown in Airbnb pictures, and has a lift, so the height to get there should not worry anyone, that is not always the case for Madrid and Spanish old towns.
Everything is well thought, the kitchen, TV with English programs, all necessities for the bathroom, nice lighting over the apartment, appealing furniture.
Just take care for the stairs inside the apartment, as it is a two-story one, as you won't avoid going up and down from the bedroom to the hall area, kitchen and bathroom. But it's certainly safe and well done.
We are quite heavy travellers with Airbnb and we may say Lina and Joaquin are doing great job creating possibility for this kind of a stay in the center of Madrid. Totally recommended.