We had a real good time at Christos' place. The flat is a bit outside of the buzzing streets of downtown Athens and it is was exactly what we were aiming for. The metro is a 2 min walk from there and that is super convenient. The neighbourhood is a bit in need of some urban renovation but it has a good feeling to it (lots of friendly cats!) and it has a couple of pleasant diner (Kapani, Bee Raki) and breakfast joints (Akrovolis) around.
We slept super well, it is very quiet at night and the beds felt good. Christos was a really chilled out host (we checked in quite late as our plane was landing around 22pm) and was helpful with recommendations and advice. Overall we very happy with the Athens experience and that place.