Julia and Enrique's apartment was very clean and comfortable; we slept well every evening. There was tea, coffee, and toast available for breakfast - which was an unexpected but nice touch. The apartment is conveniently located within a 2-3 minute walking distance from the Arguelles metro station. My only advice is to space out your showers because it takes the hot water heater a while to replenish and heat up again,...but this might be the case with most apartments in Madrid.