The owner is very kind and welcoming, he gave us a lot of good advice for transports (from and to the airport, supermarkets in the area...).
The flat is very good and a lot is provided with it, particularly in the kitchen where there are a lot of utensils available. If anything was needed, the owner was always available to help.
It is located near the Retiro park with good buses and subway connections to the center and the rest of the city. Moreover, it is very close the Atocha train station.
The area and the flat itself are very quite and peaceful.
The plus is the acces to the shared terrace (only with the owner) where you can eat your meals and enjoy the sun.