Fernando was undoubtedly the best host I have ever encountered. He went out of his way to offer advise, suggestions, information, was always immediately available, and truly cared about how we were doing and what he could do to make our stay in Madrid even better.
The apartment was the best my daughter and I could have hoped for: the location was perfect, it was extremely quiet notwithstanding its central location, very convenient and fool of sun, with beautiful rooftop view of the old city.
The beds were extremely comfortable - and I say that as someone who suffers from back problems.
Just take into consideration that it is located on the fifth floor with no elevator: for us it was no problem at all, doing a little exercise after all the great food Madrid has to offer...