Mercedes’ flat is well located near Atocha station and many of Madrid’s best attractions, like Retiro Park. The rooms are very clean and the decor is tasteful, and smoking is allowed in the flat. The walls are thin, but not atypically so for apartments in Europe.
Mercedes was a very gracious host with easy and flexible check-in and check-out. She also has an adorable little dog who often greets visitors at the door. I certainly enjoyed my stay without any issues.