We stayed at Eirini's place during Easter. The place is located right down the street of the Exarchion place with a lot of cafes and restaurants. Its a very lively neighborhood, but not the safest. Plaka and the old town are a 30 min walk or 10 min Taxi drive away.
The apartment is a bit dark and cold, but very pretty, with nice antique floors.
We did not get to know Eirini, but she did everything to arrange the stay - even with our super early arrival. The communication was extremely nice and we felt well looked after!! We definitively recommend the place!!