We stayed 2 adults and a 6-months-old baby.
The flat was perfect for hosting a baby: Two bedrooms meant the baby had his own room and could sleep uninterrupted; Each room has electric blinds that completely darken the room, which is perfect for a sleeping baby; Katerina provided us with an excellent baby cot and high chair the our baby loved; The living room was large enough for us to place a blanket and let the baby crawl around.
The kitchen has everything you need and is very convenient.
The neighborhood has useful amenities such as laundromats, luggage storage and a minimarket. A few meters from the place you can find Italian food, burgers and ice cream.
The place is a walking distance from Acropoli metro station, and it's convenient to walk to and from it with a stroller.
On the way to the metro station there are many restaurants and coffee shops.
Note for strollers: There are a few steps where you must lift the stroller by hand. Wan't hard for us, but worth noting.