We spent 2 nights in the apartment and we felt very comfortable during all our stay.
The location is perfect, in a street very very close to the Acropolis with amazing views.
They recommended us a taxi driver to pick us at the airport and to do some visits; the driver was very kind, helpful and attentive.
It is true that the internet connection wasn´t working very well.
If we come back to Athens we would definitely repeat!