Antonio was a really great host, he was really accommodating and the place was really really really clean, close to the center, well furnished... only positive things to say. We didn't take the metro because everything we had to see was at a maximum of 15 minutes walking:gran via 10 minutes; La chocolateria San gines, less than 10, same for Prado museum and Reina Sofia national art centre.
The apartment was big enough for 3 people, we had a really nice stay thanks to Antonio.