A nice, small room at a very reasonable price close to downtown Madrid. The subway stations are about 4 blocks away, there are some good restaurants close by, and you're only about a mile walk from the major tourist places in downtown Madrid, including Palacio Real, Mercado de San Miguel, Plaza Mayor, and Puerta del Sol. Prado is a little farther, but only by about half a mile.
Violeta and her family were very friendly and kept things as clean as possible.
Only downside I would say is the hot water goes away fairly quickly, but if you wet yourself, turn off the water, soap and shampoo up, then rinse yourself off, you'll have enough hot water to be fine. And you'll have no real issues during summer, but I came during winter.