We loved the apt’s location right at Kerameikos metro station, the same blue line from the airport. It is near enough to the attractions, without being right in the main tourist areas.
There are many nearby restaurants and bars. As commented by others, we could hear the music from the clubs, but Ioanna was upfront about it, and even provided earplugs.
The apt is spacious, and generally well equipped. It is also rather private as there is only one apt per floor.
Ioanna is the best hostess one can ask for! Very responsive and helpful, especially when we were looking for things in the apt. She also helped us with our travel queries about other parts of Greece.