Spacious apartment in a great location if you want to be close to Athens tourist attractions. We were able to walk just about anywhere we wanted within 30 minutes. But also was a tiny bit off the beaten path so got away from the hyper-tourist areas. Very close to subway and taxi stand. Felt fine walking around at night, there are many people out on the street. Lots of good eating spots within two blocks of the apartment. Recommend this place in particular: https://www.tripadvisor.com/Restaurant_Review-g189400-d4004713-Reviews-To_Krasopoulio_tou_Kokkora-Athens_Attica.html
Some minor drawbacks to the space:
limited kitchen supplies. We didn't want to cook, but if we did I did not see any cutting boards, pots or pans.
Construction noise from the street right nearby started fairly early in the morning. Not unexpected for city living .
Heads-up - there are three apartments in the building. This one, on the top floor of a walk-up is the only one that is occupied. They're renovating the other one(s) I believe to be additional airBnB type places.