Luis' apartment was supercharming, with interesting artwork all over. High ceilings, full length windows, huge comfy sofa bed in the living room, equally comfy bed in the bedroom. Madrid can be noisy but the apartment serves as a haven from that. It's walking distance to Plaza Mayor, Palacio Real, Jardin de Sabatini, etc. Quiet and convenient. Luis was also very pleasant and accommodating, even gave us recommendations where to eat. Muchas gracias, Luis! I highly recommend his place and hope to return.