The flat is very centrally located and affordable which in Madrid starts to become a challenge on Airbnb. We rented it for our parents who were visiting us, and even if Calle de Atocha might not be the cleanest street of Madrid, it is very safe for anyone to walk in at any time of the day and night. The flat is confortable (winter) and even if not fancy, very much sufficient for anyone looking to visit the city by day and stay at night in the flat. We were not disappointed, our parents have had a great time in the Capital - and we recommend Sergio as an host. He was prompt to react to any issues you might face.