Best location available if you want to be centrally located and amongst other visitors of Madrid. The hosts were kind and coordinated check in and even arranged for a taxi to pick me up at the airport. There were some issues with the lock to keep in mind as well as construction going on in the building across.
The men working across the building were constantly watching me which made me really uncomfortable. It made me to not want to leave the window doors open (which is one of the best parts of the airbnb) or be there during the day. This is obviously not at all the fault of the hosts or the listing. Just something to keep in mind, especially as a solo female traveler.