My family and I stayed at Ramon's flat for two nights, and we have nothing but great things to say about the flat, location and the host(s).
While most of my communication prior to arrival was with Ramon, Marco was the one who handled our check in and was the point of contact during our stay in Madrid.
Both Marco and Ramon were fantastic. Patient, helpful and very approachable. One of the lights in the bathroom needed repair and we needed an iron, Marco had it arranged within two hours of being notified.
The flat itself is true to the pictures. Immaculate, tastefully furnished and with a gorgeous view.
The flat overlooks Plaza Santa Ana, full of tapas bars and activity. Plaza Mayor/Prado/Retiro are all walking distance.
Great experience! Will definitely come back!