I spent a few days in Sofia's flat at the end of May, when I attended a workshop in Madrid. I absolutely enjoyed staying there. The flat is small but has everything you need, and it is certainly great for one person. Maybe for two or even more people, it might be a bit tight. Up on the fourth floor with windows to the inside court, it is also really quiet. I also enjoyed the area (Chueca), which is not yet totally gentrified, so there are nice bars and cafés and local people - although it is just neighbouring the truly touristy central spots. It was a great pleasure everytime when walking "home" to turn from the busy noisy Gran Via and to plunge into the lovely authentic neighbourhood.