Carlos's place is great. I would recommend anyone to stay there! Carlos is a great host Lots of communication, very friendly and answered any questions straight away. He also accommodated me when I needed to change the dates of my stay. Very clear instruction of how to get the keys for the apar. Very clean and tidy, great location (~5mins to a metro station) - I walked pretty much everywhere from the apartment (the palace, gran Via, Retiro) and I felt safe to do so. Very close to a 24hr supermarket. I couldn't fault Carlos's apartment. Thanks Carlos!