Natalia's apartment is amazing. It is not big as judged by the pictures in the posting but it does not feel too crowded with the 4 of us. It has everything we need. The kitchen is well equipped.
It is in a quiet neighborhood and at the same time at a very central location. The busy areas are just a few minutes away on foot. Puerta del Sol, Plaza Major and the Palace are all within short walking distance.
We truly enjoyed our stay at Natalia's place. Highly recommended.