Eleni's place is very nice and we had a great time. We were 3 friends and stayed for 3 days.
The flat is clean, confortable and quiet, with a nice view on the Acropolis.
The street and the building entrance doesn't look like much but the area is really great for going out or as an exploration base. It is also very close to Monastiraki subway station wich is very convenient. Eleni was very helpful and flexible to arrange for our arriving / departure etc. I would stay there again if I had the chance to.