I regularly go to Madrid for work and usually stay in the Embajadores/Atocha area. Leandro's place was definitely the best apartment I ever stayed in. In addition to the great location, the apartment is very sunny and quiet, the kitchen has all the necessary appliances for a long-term stay, and the building has an elevator, something many buildings in this neighborhood don't have. Leandro responded to my messages promptly and was also very flexible and accommodating. I hope to be back!