I am so glad I found this place.
I think I was researching for more than 6 weeks which neighborhood to stay in and then which apartment in that neighborhood. So glad we settled on this neighborhood and this apartment.
You are right in the middle of absolutely everything. Quick walk to Puerta del Sol or Plaza Mayor. There's a metro stop at the bottom of the street, a very nice pastry shop as well. And a bakery/cafe at the top of the street. And don't forget the amazing sherry bar in-between the apartment and pastry shop. The Prado and innumerable other world class museums are within walking distance.
Very quiet apartment and neighborhood. Yes. There are fancier and more expensive neighborhoods to stay in, but why?