The apartment was a perfect, central location for us to explore Athens for the first time and we absolutely fell in love with the city! We also went over the long Easter weekend, which was, surprisingly, a perfect time as many Greeks leave for holiday and the city isn't too crowded, too busy with tourists or too hot yet though everything is generally open for business and lively with a good mix of locals/visitors. The only thing to be careful of is changes in opening hours for museums/sites given the holiday (for us it was 12-5pm Good Friday, 8-3pm Saturday, closed easter Sunday, open easter Monday), though in exchange, we got to experience the unique Greek Orthodox Easter traditions, including fireworks by the Parthenon on Saturday at midnight.
The apartment was clean and comfortable, and perfectly situated nearby lively restaurants and shops and within a very easy stroll to everything you would need or want to see in the center of the city (Plaka/old town area, national gardens, acropolis & museum, new town city center, old town ancient sites like agora and Haitians library, and right across from the Acropolis metro stop, etc) not to mention the view of the Acropolis each morning was absolutely incredible!
Aristides was a great host and offered a number of very helpful suggestions for places to eat/visit, left very clear instructions throughout the apartment and checked in with us intermittently (via the app) to make sure everything was going well during our stay. We do not have kids, but the apartment seemed perfect for a family of 4 as well as couples (us). Also had a lovely guest book with helpful suggestions for great coffee, traditional Greek food, sweets, etc. from prior guests, many of which we tried in addition to Aristides' advice.
Overall, would highly recommend it and would stay here again when we are next in Athens!