I found exactly what I was looking for with José. He is a very polite and nice guest, calm and mindful, I really liked talking with him. He prepared a tourist map for me and he is very reactive to give answers and advices (despite of his respectable work), and at the same time when I needed some privacy or felt like doing things on my own he would let me. No worries if you are not too comfortable with Spanish, your guest will either talk in English or encourage you to train to speak his language with great patience;) The flat is well located, close to the train and the metro station, and the Prado museum and other sites of interest are easily reached by walking. It is a secured flat with a nice porter, who borrowed me a set of key. It's spacious, clean, warm and calm. I had access to the kitchen, including teas, coffee, juice, milk etc... the bed was super comfortable, wifi is fast... If you are on your own or a couple willing to wander around Madrid I would absolutely recommend José's flat.