great place for a city-trip to Madrid: within walking distance to all major sites (Prado, Reina Sofia, Plaza mayor, Royal palace,...) and railway station Atocha. Metro station close by.
the appartment is off course quite small (city center), but everything is there for comfortable stay (cooking utensils, dishwasher,...). Bathroom (shower) may need a bit of refurbishment (sliding door, joints,...) but that is a detail.
great host, that answers all your questions within minutes, and is quite flexible : we were a bit too early but that was ok, and someone was there to welcome us.