Costantinos cares!
He gave us a really sweet welcome, and he was really patient and kind, considering that we arrived in town literally at Christmas lunch time!! The apartment is cozy and warm, there was everything we needed and even more. The position is perfect - few minutes walking from M3 (to the airport) and not far from city center, where we always walked - and the neighborhood is quiet and full of nice little bars and shops.
If we plan another trip to Athens we're gonna get in touch for sure!