The apartment was excellent, very clean and large enough. The large balcony was a big plus! The stay was very pleasant and the apartment has everything one needs, the location is excellent (close to restaurants, the acropolis, main road, etc...). I'd stay again if I were to return to Athens.
Only the lighting in the bedroom was poor (1 lamp that doesn't light up the room well), and the checkin process was frustrating because of no mention of the floor where the apartment is, so you have to guess and try different apartments. The checkout process was even more frustrating as there were no instructions at all on where to leave the keys.