Everything went perfectly, the apartment was amazing for a two week-stay alone. The closeness to Amelokipoi metro station allows to go to the city center in 10 minutes, but also to visit everything without taking any public transport, if you like to walk
Although I didn't see Olga, everything was really easy so was communication
I would highly recommend staying at Olga's place.
The big perk of the apartment being the 15m² terrasse on the last floor with an incredible view on the Lycabettus hill, perfect for taking a breakfast under the Greek sun