Yolanda was very welcoming and helpful.
The flat is easy to access from the airport, the express bus goes to the Atocha station which is then a 5 minutes walk to the flat.
I loved the neighbourhood which has a lot of nearby cafe terraces, a supermarket, a metro station, museums, the Retiro park...
The flat itself was perfect : very clean and exactly as pictured. It's on the ground floor, which was great to keep it cool during the very hot days in which I stayed. Overall I highly recommend this flat for your stay in Madrid!