We spent 7 wonderful nights here. Location is absolutely wonderful in the heart of the old section of Madrid, far enough away from the tourist traps and gathering points.
While cosy in size, it was well furnished with all we needed, including washing machine, cooking gear and equipment, hot plate and microwave, large refrigerator.
Only tiny gripes was the couch/sofa left armrest was broken making it uncomfortable to lie on it or sit on one side of it, and the carpet was old and curling up at the edges. Both need to be replaced and the apartment will look more like the photos and have a really wonderful vibe.