I stayed at Maria's for about a month.
Maria was a very kind host and made me feel welcome from the very first moment.
She was gracious enough to allow me to check in hours before the standard check in time as I landed early morning in Madrid. She even put her aunt through the hassle of handing over the key to me because she was at work herself.
I had a very pleasant time interacting with her and she was very hospitable and friendly throughout. She offered me some tips about what do in Madrid as well. For international travelers, Maria speaks fluent English and you will not face any problems on that front.
The house itself was as advertised in the pictures. The bedroom was cosy and the living room was as stylish and spacious as it appears in the pictures.
The neighbourhood is very quiet and safe. The house is walking distance from the Santiago Bernabeu!
I even had the chance to meet her aunt who was very kind and sweet too. (She spoke in Spanish, but Maria was kind enough to translate).
All in all, it was an extremely pleasant and comfortable experience. I know where I'm staying when next in Madrid!
Muchas Gracias Maria:)