We spent four nights in Elad and Vasileios's apartment and our stay has been great. The apartment is right in the center of Athens, at no more than 15 minutes walking from the main metro station in Syntagma and from several nice districts (Exarcheia, Kolonaki, Monastiraki). The apartment is a comfortable daylight basement, clean and equipped with almost everything you may need and the host was really kind and helpful with our needs, also in terms of flexibility of the check-in/check-out.
Really good quality/price ratio!