Two of us stayed at Moncho’s place for four nights. We were met by Ada, an associate of Moncho, who checked us in very efficiently. We found the apartment to be extremely clean, very quiet with the window closed (even though it overlooks a busy street), and perfectly comfortable and suited to our needs. The mattresses were great - nice and firm :)
There is a perfectly good elevator, but it’s a bit small for my taste, so after the first ride up I opted for the stairs.
The location deserves special mention: we easily walked to the train, El Retiro, El Prado, the Rastro, Plaza Mayor, Puerta del Sol, ... Just perfect.