Apartment was very centrally located. Easy access to metro stations. However, apartment (especially bed) is pretty small. It is okay for 2 people though - would not be comfortable for more than 2 adults.
Luz is a great host as she was very quick to respond to all questions via the Airbnb app. Our flight arrived in Madrid a few hours before the official check-in time so Luz was kind enough to allow us to drop our bags off (and check-in officially a few hours later). Luz left some chocolates and other sweets around the apartment (including a bottle of wine) - which was a sweet gesture.