The apartment is modern and clean with comfortable beds, huge balcony and fast and stable Wi-Fi. It is located in a quiet and safe area, near the supermarket, bakery and pharmacy. It is very close to Syngrou Fix Metro and tram station (5-6 minutes), just one stop of Acropolis Metro station and two from Syntagma square, but you could just walk to there and other major tourist destinations.
Christos is very helpful host. We had a perfect communication with him. He is always reachable by Airbnb. We asked him to pick up us at the metro station, and he was waiting for us.
I would recommend this apartment.