My partner and I spent a week at Marietta's apartment and found it a perfect stay for us.
The apartment itself we found to be very clean, comfortable, inviting and with all the amenities required for a couple on a short stay, not to mention pleasantly furnished and decorated with some beautiful pieces of art work which we later learned were drawn and painted by Marietta herself.
Marietta was very approachable and communicative when required from as soon as we had confirmed our booking.
Our flight was an evening flight and despite the flight being over an hour delayed Marietta reassured us this was no problem for her and met us with warmth and kindness from when we reached the apartment to check in.
The area is quiet and a 25/30 minute walk away from the acropolis, where a long the way there are quite a few coffee shops, shops, restaurant's, bars and fast food.
We would highly recommend this air BnB.