We spent a nice week in Daniel's apartment.
The apartment is fully furnished, nothing was missing. It is ideally located, near the metro (Atocha station is max 15 minutes from the apartment), near the best museums, near Gran Via for shopping.
We were only distubred by the works ongoing during the day in the building opposite the apartment. In the beginning of May, this building was being renovated. Daniel apologized for this inconvenience which was out of his control. It was a bit noisy during the day, but it was not really a problem since we were most of the time not in tha apartment.
Daniel is a marvelous host: he left some food for us in the fridge and gave us pieces of advice on places to visit in the neighborhood and nice restaurants (such as "Lamucca" which is 5 minutes from the apartment by foot and is really delicious).