Nelson's studio is perfect for short stay if you want to see Madrid by foot. As other travelers said, it's close to everything and in the area of many shops, restaurants, and cafes. The place is located on the ground floor inside of the building courtyard. It's has a very little of natural light, but then you are not in Madrid to stare at it through the window. It's a very small studio but surprisingly, the kitchen has literally, everything you can possible need to make your stay enjoyable. The apartment is also very quiet at night, so if you are light sleeper, you will love it.