We had a great stay in Athens in the apartment.
The host is amazing, caring, always available to answer questions and advised us on activities in addition to helping with the apartment, a big thank you to him!
Regarding the apartment, it is close to the city center, as per the pictures, it is very comfortable.
A small drawback is that the apartment is a bit damp in winter, so maybe not ideal for long stays in this period, but apart from that there is nothing to report.
In any case I recommend this apartment, I spent a very good stay!
Thanks again Konstantinos.