Konstantinos is a fantastic host. I was traveling with my baby girl and he offered to pick us up @the bus stop and helped me with all the luggage. He is very nice and helpful with anything needed.
The apartment is perfectly located even for little kids- there is a park just down the street with playground and birds. There are also very nice bars, cafes and restaurants practically down the street.
The apartment is nice, very clean and all you need for a short term stay in Athens. I can absolutely recommend it!