We had a fantastic stay at Spiros's home, indeed, it felt like a home to us as well while we stayed there. Everything fit right. We loved the fantastic terrace, the cosy living room, and the comfortable bedroom.
The distance from the main tourist attractions was also perfect, not too far, but far enough that you felt that you were staying in the "real" Athens.
We felt very safe coming and going even after dark. The street that leads to the apartment is full of restaurants that are affordable and seems to serve the neighborhood. There was a grocery store very close, where we mostly picked up breakfast items. Make sure you explore the close by hill called Filopappas (sp?) that has an amazing view of both the Acropolis and the Agora, among numerous other historical artifacts, not to mention, a beautiful walk. Another pleasant surprise was the low cost of taxis. It is not much more expansive then buying two tickets on public transport.
We also found Spiros warm and very personal and knowledgable. Since we didn't have any problems, we didn't have any contact with him after check-in.