My husband and I enjoyed our one night stay in Athens. It was easy to communicate with Nassos and he provided very detailed information on how to reach his apartment from the airport via metro. He is only two stops from a very busy and lively area of Athens - can easily pass time there as there is lots to see.
The apartment can be cold, even with the heater on (not very strong). We had to layer up a lot. We were also surprised to find nail clippings and hair that didn't belong to us on the shower walls and night table.
Overall, with a bit of improvement on cleanliness, we'd recommend his location and apartment. Thank you, Nassos!