Very nice flat, well located: good food in the neighborhood (in tavernas frequented by local customers), the Acropolis and the town center is accessible by foot (you can have a gorgeous view of the Acropolis from a park nearby), and the apartment itself is exactly what we needed, with a pleasant balcony and a lot of handy things. A huge thanks to John and Georges who welcomed us and showed us everything useful in the neighborhood.
If I ever come back to Athens I know where I'll stay!