Fantastic stay - would definitely try stay here again if ever in Madrid again!
The location is brilliant; right on the main street in Madrid but the apartment still stays really quiet. The apartment itself is really clean, modern and spacious with a beautiful terrace; there are 4 bedrooms all with comfortable mattresses and excellent air conditioning in each. We visited with 2 small babies and 7 adults, but still felt there was plenty of space and everyone slept well!
Carlos is also deserves his Superhost rating -- he is really prompt at communicating, he helped us at check-in with all our luggage, and leaves clear instructions for everything. This was our best AirBnb stay in Spain by far.