You are lucky! Giannis's place is the best you can stay in Athens. All major sights are within walking distance; the Acropolis (and metro station) and the Acropolis Museum is only a 3-minute walk away.
This is an extremely comfortable apartment, furnished and decorated in great taste, where the hosts paid attention to every little detail.
Giannis' guide book includes wonderful places; I especially appreciated the non-touristy local recommendations.
Hot water supply in Athens is usually a problem, but in this apartment even this worked perfectly, which shows how special this place is!
This house is very beautiful in the inside as well, this is noteworthy in itself. This place is one of the best airbnbs I have ever been to. Thanks a lot for having us!