Just got back from Athens. Had a really pleasant stay at Giannis' apartment. Its close to the metro station about 7 minute walk and then just 3 stops to Acropolis. As the metro runs till quite late, we usually returned back around 12 am and never felt unsafe in the area.
Shops and cafes are open till quite late, so you can always grab a bite on the way. Exactly the same as it looks in the pictures and Giannis is a great guy, always available for any questions you may have. We recommend this place for sure, great price and location. Enjoy Athens!