The place is lovely, safe, and a perfect walking distance to everything the city has to offer. We would stay here again!
We’d suggest having any taxis pick up outside the Fresko Yogurt Bar (right by the apartment) and having your walking directions sent to that since it’s much simpler to find on a map. The metro is extremely affordable and a great source of travel to the airport (about 10-15 min walk to metro station) and to Piraeus (ports for ferry). You will need cash for taxis, and shops will give you a cheaper deal if you ask. Some shops don’t take card.
We took a ferry to a nearby island and the beach was next to the port for a lovely beach day.