We had a wonderful week at Christina's place! The apartment is really nice and clean, just like in the photos.
What is even better is the fantastic location in the middle of a very charming neighbourhood, very near the centre of Madrid. Even though the neighbourhood is full of bars and life in the nearby Plaza and the apartment is located at street level, we were not disturbed by any night-time noise because the apartment is in a quiet street.
I sincerely recommend Christina's place to anyone wishing for a beautiful and authentic Madrid experience - and I would love to go back myself!