We had a great stay at Alexandros' place in Athens. It is very central, right in the middle of Plaka with the Acropolis and all sights within walking distance. Alexandros was a perfect host, great communication prior to our check in. All our messages and emails were answered almost immediately! He met us at the train station and walked us to the apartment. This is very easy to get to from the Airport and Piraeus port by train. I can recommend this as a great place to stay in central Athens.