We had a lovely stay in Athens at Arygro's flat. It was in a good location - a short walk (10mins, if that) to Monistiraki and 5mins walk to Gazi, and nearby to plenty of good restaurants and bars. (I would particularly recommend a visit to nearby 'To Steki Tou Ilia' in Thisseo for a traditional lamb dinner)

The flat itself was spacious with good air conditioning and a comfortable bed.
We didn't get a chance to meet Argyro during our stay, but she was very friendly and accommodating, and responded to all our queries quickly.
I would definitely consider staying here again the next time I am in Athens, as it is well placed for both sight seeing and going out at night.