Nasos is a very nice host, he waited for us in metro station, he helped us with infornation and all we needed such as maps, referentes and even a snack :)
He seems to be a good and pragmatical person. The appartment is wonderful, only for us, in perfect condition, quiet and in the heart of the acropolis. You can go to all the places walking and you are close to metro station (we had to go at 5 AM walking and the neirborhood is safe).