I highly recommend Polina's apartment. It was clean, lovely, well decorated and with many daily equipments. In addition, the location was so good that it's just nearby the tram station and it is even not too far if you want to walk to the viewsights by foot.
Polina is a cool and responsible hostess who answered our questions very quickly and arranged well our transportation from apartment to the airport.
All in all it was a lovely trip in Athens with Polina's accommodation.