Very good hosts who are extremely helpful in accommodating guests needs. We were allowed to leave our bags in the apartment before the check in time.
The location is GREAT and the apartment has a lot of light! Walking distance from all the shops in Serrano and the rest of Barrio de Salamanca (Spain's golden mile district).
Comfort in the apartment is also great with modern bathrooms and independent AC units in each room that can be controlled independently for each guest. We are definitely staying here again for our next stay.