Dimitris is really a nice person. He helps you. The apartment is really nice, small, but really nice. The rooftop apartment have a huge terrace and it have the most beautiful view over the sunset and with an open door is doesn't matter that the apartment is small.
The metro is just 5-10 minutes away and goes directly to the part of the city where things happens ( acropolis and so on)
We enjoyed our stay and I think you will too.