We had a pleasant stay at the apartment and everything has been like described by Efthimis. The view from the balcony is great, the apartment was clean, bed and mattress are good, water of the shower is hot... :)
Efthimis is a great host and he did everything to make sure, that we enjoyed our stay in Athens. We were there for the opening of documeta and the most important for us was to reach all the places within walking distance or easily by metro. The next metro station is only a few minutes (1 -3 minutes) away, good restaurants and bars are nearby and the area is a good starting point for sightseeing tours.
We can highly recommend the apartment! Thank you for everything, Efthimis!