Gheorghos's apartment is absolutely gorgeous and we loved staying there. There are two huge bedrooms with comfortable beds, a lovely sitting area, a large, efficient kitchen and a totally workable bathroom - constant hot water without having to worry about it. Outside the terrace is sunny, pleasant and private - lovely for sitting out for breakfast and evening drinks.
The area is great; upmarket and very safe. Loads of restaurants around and a not too long walk to Syntagma Square. We walked to the Acropolis, the Roman Agora etc. - didn't take the tube once, but did get taxis back - very reasonable. Gheorghos is a great host; he gave us a comprehensive tourist guide on what to see when, and then left us alone, except for booking airport taxis when we needed them. The only thing Gheorghos can do to imrove this apartment is to provide a few wooden spoons for stirring, a small saucepan, and, perhaps, a toaster - it has everything else!