Panagiotis' place is a great place to stay, close to Thisseio metro station, to Acropolis and Plaka, to restaurants and supermarkets.
The flat itself is recently refurbished and has all the amenities, it is very clean and it is situated in a quiet pedestrianised street which makes it ideal.
Panagiotis was very to commuinicate with, very polite and a great host.
I would recommend his place without any hesitation.