At the price we rented the place was absolutely awesome. Photographs are very accurate and the place is nicely decorated and very clean.
The location is awesome. Quite, next to the American Embassy, the Naval Hospital and the Athens Concert Hall, which means lots of very obvious police presence.
Walking distance to city centre as well as to the metro. Taxis are usually around the corner.
Very nice bakery with sweets and coffee by the corner to get your breakfast.
Only two problems is the lack of sunshine (the apartment is ground floor) and the noise from the main building opening and closing (if you are light sleeper you may be woken up) - neither of these two things bothered us.