I had a wonderful stay at Antonia and Stefanos place. The apartment had a nice living room area, a terrace, a full kitchen, a separate bedroom, and a small but functional bathroom with a washing machine. The apartment was clean and comfortable. There is air conditioning in the bedroom, so I was able to sleep comfortably in the late September lingering summer heat.
The apartment is extremely close (just a 15 minute walk away) from the acropolis and other major sites/museums you might want to see and visit. The neighborhood is quiet and safe with some very good dining just a few blocks away. If you stay here, I highly recommend the restaurant 'Seychelles.'
Stefanos was there to greet me upon my arrival and he was easily contacted with prompt responses with any questions I may have had before and during my stay.
Overall, a lovely experience! I would come back to Athens and stay at Antonia's.