Very cozy place to stay. We arrived very late, around 2 AM, to the Athen, and there was a nice woman to welcome us to the house. This place feels like home and very well equipped. It's also extremely clean.
It is very close to the Acropolis and many other monuments and landmarks are located in a walking distance from home. There are lots of markets, bakeries, restaurants, and coffee shops nearby as well.
Overall, we really enjoyed our stay at this place and will recommend it. The only drawback of the place is the parking, which I believe is a general problem in Athen. You can hardly find a parking spot. I suggest if you're planning to stay here, do not rent a car.