My mother and I stayed in this apartment for five days in September. It was the most pleasant apartment we stayed in during our month in Europe. It was clean, spacious and well placed. A perfect place for those who enjoy walking through the city of Madrid. The owner was extremely thoughtful. She met us, talked us through instructions such as locking the door, using the washing machine and kitchen, and using the internet. Along with that she left easy to read written instructions, as well as recommendations for restaurants, using the metro and sightseeing. There were brochures about Madrid for us to look through, and she was always contactable to answer any questions we had and she kindly made a reservation for us one night seeing we didn’t speak Spanish.
If you're a light sleeper the garbage trucks at 4.00am might wake you up. Also, the apartment building is very close so you can hear your neighbours clearly and it doesn't feel overly private if you have the windows open. Given we were out most of the time this didn’t bother us a great deal.