Everything was fine.
The location was really good, everywhere was close (acropolis around 15 minutes, lycabettus mount close as well), good food around. The bus for airport really fast (1h max).
It wasn't problem communication with owner(always answers very quick). Billy was really helpful and friendly. He showed everything what was necessary.
The apartment was ok. Good beds. You can see the Acropolis from balcony.
Recommended :)