Good value for money.
The apartment was spacious, bigger that it seems in the pictures, newly renovated and sparkling clean. There is a lot of public transportation just outside the door that can take you everywhere in Athens. Lots of restaurants nearby and food store across the street. Metro was just 15 min walk. Safe neighborhood with mixed Greek and international aura.
Communikation with Konstantinos was easy, check in/out very comfortable. I will definitely stay in Konstantinos apartment next time I will visit Athens.