Spiridoula's apartment is very nice, we were 6 friends and spent 4 night there. The place is close to the Attiki metro station about 2 minutes of walking. We found everything to be great in the apartment, the rooms were big and very nice, the terrace is a great place to spend time during the morning and the late evening. Spiridoula was a great host, our check-in hour was late in the night at aprox 23:50 and she took the time to receive us and show us around the apartment. She gave us tips on what to do in Athens, places to see and what and where to eat.
Overall it was a great experience and I would strongly recommend Spiridoula's apartment if you need a place to stay in Athens.