My girlfriend and I visited Athens for a 3 day weekend and Spiros's apartment was a perfect stay for us! The apartment is located in the city center, within walking distance of all the tourist sights (e.g. Acropolis), nightlight/dining areas, shopping, museums, and main square. Metro station is only a 10 minute walk away.
Check-in was easy and Sprios was available via phone while his mother helped us check into the apartment without any problems. Apartment is on the top floor (5th) and there are only stairs, so fair warning should you bring heavy luggage. But once you are in the unit, it is worth it! View is the best feature, with a large terrace overlooking the entire city and a great view of the Acropolis.
Flat is large with one bedroom and couches to sleep in the living if you are more people. Small kitchen provides a sink, small fridge, pantry, and coffee maker. Wifi was perfect and bathroom is small, but clean.
Thank you Spiros!