The greatest characteristics of Anna's apartment are indoubtly Anna herself and the location. Starting with the last, the apartment of Anna has a great location, very close to the Museum of th Acropolis. From there is very easy to visit several high spots of Athens (e.g. Museum, Acropolis, Hadrian's arch, Plaka...). Keep in mind that just in front of the Museum you will have also a very convenient metro station which allows to connect with the rest of the transportation system. Moreover, just in front of Anna's apartment there is also a bus stop. As for Anna, she is a marvellous, very gentle and worm woman: she will embrace (literally) you as your host as a family member would do.
The apartment in itself is suitable for 2; there is also a sofa which becomes a bed and where other 2 people could be hosted if needed. The apartment was clean and furnished with basics, although it is not the newest, most fashionable airbnb you could find in Athens. Please keep in mind you are in the very center of Athens, at the ground floor. The presence of some insects is inevitable. During summer it could be quite hot, since the air conditioning is quite old.
If you are in search for a simple place from which to explore easily the city, it could be a good option.