I stayed in the apartment for a month and really enjoyed it, it feels like home and doesn't miss any equipment. The WiFi is fast and works reliably. The apartment feels very safe. I loved the communication, there are multiple co hosts that care for the apartment so someone always replies quickly.
Fun story, during my stay one of the door handles got loose and I couldn't get out of the sleeping room, so I had to call from he window. The host reacted quickly and got it repaired the same day.
Only thing slightly bordering is that there are noicy bars nearby and they don't really care for any sleeping hours. Then again, that's true for most apartments in the Athens inner city.
All in all would gladly stay here again.