Isabel's apartment was a perfect place to stay. The apartment not only matches the photographs but is exceptionally clean and had all the necessary kitchen tools and appliances. The sofa bed was very comfortable. There were plenty of bakeries and food stores nearby. Isabel was there to greet me when I arrived (which was a little late due to construction works that will apparently continue throughout 2016) and she made me feel very welcome. She also gave me some assistance when I became sick during my stay. Getting into the city proper is not too difficult: you can either walk straight down l'Escorial but there is also a bus stop only a minute or two from the property.
All in all, I'd highly recommend this listing!