The place was really great. A small and cozy studio apartment, with all the utilities you might need (coffee machine, washing machine, AC, etc.), situated next to almost everything. We walked everywhere, the apartment is 15 min away from the main attractions and touristic areas of Athens.
Konstantinos was a great host, provided helpful info regarding how to get to the location from the airport and answered any question or curiosity we had about Athens.
I highly recommend this place if you want to visit Athens.