Loved my stay in this apartment! It is centrally located to all of the key attractions in Athens and there are some great bars and cafes right below the apartment. I loved being able to walk up the end of the street to get an amazing night view of the Acropolis.
As a solo female traveller I felt safe in this neighbourhood and catching the Metro to and from the airport couldn't have been easier. You have the option to change at Thissio station but the main station Monastiraki is less than 800m away and goes directly to the airport.
The nightlife below is quite noisy and could be difficult if you were a light sleeper, however I had just gotten off a long flight from Australia so I had no issues sleeping for the two nights I was there :)
I didn't get to meet George but all of his communication was great and he was very quick at responding to my questions prior to and while I was staying here.
Highly recommended as a great spot to base yourself to explore Athens!