We have travelled a lot and this is one of the best Air B&B apartments we have ever rented. It is perfectly situated to explore central Madrid, and also close to the Metro for other excursions. Lavapiés and La Latina are full of fun restaurants and bars, and there are cafes, grocery stores and other amenities within blocks of the apartment.
But the flat is so cozy you might have a hard time leaving! Great open layout, comfy firm bed, exquisite shower, great lighting, stunning views of Madrid (I think you might even be able to see Toledo!), an espresso maker, a Nespresso, and basic supplies for emergency snacks. Mario has remodeled this flat in so many tasteful ways that preserve its beauty while providing modern conveniences.
Despite being in the center of the action, the flat is dead-quiet day and night. Wi-fi is speedy and consistent. And the host, Mario, is helpful and easy to communicate with.
We'd recommend this in a heartbeat to anyone visiting Madrid (who is up for climbing the stairs to this lovely attic apartment).