Manolis's place is located at the most central place of Athens. Syntagma square, Monastiraki, Acropolis, National Garden are all within a walking distance. The apartment is right amidst the market street (Voulis) so you don't have to 'go' for shopping. Though downside of this is that its busy till late hours and noisy too. I have suggested Manolis to improvise the insulation.
The apartment itself is a gem. 2 spacious bedrooms and a big living / drawing room was ample for our family of 4 (2 adults + 2 children) and our luggage. Very clean. TV and entertainment is excellent. WiFi is strong. Kitchen is very well appointed.
Manolis is great in communication and very responsive.