I have travelled and stayed in AirBnbs and hotels all around the world. I have to say hands down, this was one of the best experiences I have had.
The Atocha Apartment was extremely well designed, extremely clean and had every amenity you could want... Stove, refrigerator, dishwasher, washer dryer (Which I could actually get to work!), great waterfall showers and excellent air conditioning.
The location was awesome... It is easy to walk anywhere from the apartment. It is two blocks from Santa Ana Plaza, close to lots of restaurants and shops. Withing two blocks was a grocery store and a gym (Basic Fit) which I was able to use several days. Note that Calle Atocha is a bit noisy on the weekend, but I simply used my white noise app, which I always use when I travel and it was perfect.
Melissa managed the reservation and check in. She did a great job along the way, ensuring I understood the details prior to arrival. She had a driver meet us at the airport and bring us to the apartment. Once we arrived she greeted us at the door and walked us through how everything worked. She had maps of Madrid and Segovia, since we told her we were taking a side trip.
Nothing but great thoughts about our stay in Madrid... We came to Spain every couple of years and will definitely try to rent this apartment when we return.