My family (wife, 11-year old daughter, and I) just stayed at Athanasios's apartment in Athens. Wow...what a find. The apartment is located right across from the Temple of Zeus with wonderful views of the Acropolis as well. The other reviews mentioned the outstanding location, and that is certainly the case. The Acropolis, metro station, and good restaurants are about a 10 minute walk. The apartment was just as pictured and spotless.
Athanasios was extremely responsive always answering emails within minutes. In addition, he helped arrange transportation from the airport to the apartment.
I would recommend this apartment to anyone, especially a family, looking for a place to use as a base to explore Greece.