We really liked Marga's apartment. It is right smack in the center of the action in Madrid near Sol Station so easy to get around and to walk to all the major spots to visit. The Prado Museum is a 15mins walk as an example. The apartment is on the smaller side so perfect for two. All the amenities worked as described.
Marga was also very helpful with our late arrival which we really appreciated. The communication was perfect all the time. I would highly recommend this apartment.