Antonia and Konstantinos were super responsive, helpful and accommodating. The apartment is large and BEAUTIFUL. The location is great because you can just walk to the Acropolis and the museum, metro stations., and many coffee shops and bars.
Note that there are bars right next to the apartment, and they will be playing loud music until 3am on the weekends. The noise can be slightly attenuated by closing the windows and turning on the AC, but it will still be audible.