All was perfect. The interior of the apartment is just as shown in the pictures. Although, a bit small it has just everything one needs for a place to stay, while exploring the city of Athens.
The neighborhood (Koukaki) is one of the safest and most quiet you could stay at.
It is located within a short walk distance from the major sites ( Acropoli's Hill and museum) and just underneath the beautiful Philopappou Hill.
The nearest Metro station is less than a 10 min walk, though be prepared for a small slope when first approaching the house with your luggage.
Also, George's sister immediately responded for everything we asked her.
Would gladly stay there on my next visit and totally recommend it to everyone who wants to explore the city.