We had a really great stay for a few days in Athens. The apartment is very comfortable, clean and well equipped. For our family of four (two teenagers) it was perfect - about a 15 minute walk from the Acropolis in a residential neighbourhood. We walked a lot through the streets or the beautiful park on Philopappos hill. There are several nice restaurants nearby, very much local places rather than tourist-focused.
Mary is super-helpful with lots of good advice and very quick to respond to anything we asked. We would definitely go back on another trip.