I stayed in two rooms in Diogo's flat - the first one was the interior room which is a bit hot in the middle of the summer (in Madrid, everything is hot during this time). There is a powerful fan to help mitigate the heat. I feel that the value of that room for the price is still very good. A week into my stay, I moved to the room near the door that faces the interior courtyard. This room has more ventilation and was more comfortable.
Diogo is a great host and everything is very clean. The location is absolutely perfect. Just a few steps from Tribunal Metro station and right on Fuencarral which is a major shopping street in Madrid. Nightlife in Malasana and Chueca is also just steps away. This flat is highly recommended.