I stayed here for a couple days with my siblings, and we ended up having to check in very late (~1am)! It was wonderful how Javier was able to make the late check in possible.
Additionally, the home was walking distance to the incredible museums that Madrid has to offer including the Prado museum, and it was also walking distance to great restaurants! Even though the house was close to incredible items in Madrid, everyone in my group agreed that our favorite thing about our stay in Madrid was the apartment! If you are thinking about going to Madrid, you should definitely stay here.