Our stay at Andreas' was very pleasant. Christina welcomed us and showed us around the house, and for the total of our stay there we really enjoyed it.
The appartement was very clean and had a typical Athenian balcony. Only a six-minute walk from the metro station, and close to nice cafés in the area (Bel Ray, To Potami). Spacious, ample of natural light, has A/C (a big plus if you're visiting during the summer).
All in all, we highly recommend booking your stay there!