We had a lovely time in Athens. The apartment is located in a nice and quiet area - no tourists and feels very "local". It is walking distance to Acropolis (about 1,3 km) and to the metro. It is quite easy to get a taxi just outside the door. On the way to the metro station (Petralona) there is a lovely square with coffee shops and restaurants.
The apartment is nice and clean and has everything you need. Mary is a great host.