The place I stayed wasn't the same as the one described in the listing, albeit equipped with similar facilities. Inferior only aesthetically (e.g. peeling paint on the walls, loose tap in the bathroom, yard currently under construction), but just as functional and with a private entrance. Overall, it was a convenient stay, even though it felt a bit overpriced.
Great location, a 5 min walk to the metro, and close enough to downtown Athens to get there on foot if you feel like walking. The hill just above the house offers quite a spectacular view of the city. Stamatis was hospitable and looked keen to help with any issue I'd come across. He allowed me to drop off my luggage very early in the morning, and offered recommendations for things to do and eat.