Sergio and the room were both fantastic. I didn't have many interactions with him, but he was very responsive in organizing a time to swap keys and made me feel very welcome in the room. The room itself is very nice, with a private bathroom and comfortable bed. There is also a lovely terrace, though I primarily used the place for sleeping. The location was ideal for my trip, with lots of Madrid within walking distance. I would be happy to use this room again whenever I happen to visit Madrid.