Kostas is a very good host he gave us all the infos and advices we need. And when one needs some infos Kostas is always available to introduce you Athens and all the places you should visit and makes sure everything is ok. He is very organized host.
He came to take us at the airport (30€ for two) and we were glad as it was on the night and we were tired.
The appartement is not in the really downtown but there are 2 lines of bus (2&4) which take you directly at Syntagma square in 10/15 min. The stop is just 1 min from the appartement and they were frequent.
There is a supermarket next to the apartment and also a place where you can eat delicious pitas.
It was our first time in Athens and we fell in love with the city the food and the Greek Hospitality and kindness.