We had a great stay at Katerina's place. We went in February and it was very cosy (the heating works really well). The main room opens onto a big terrace (which is shaded from the sun), but which was a beautiful place to sit out anyway, it felt very private.
We were welcomed very warmly and really appreciated being left some things for breakfast the next day! The kitchen has everything you could possibly need for cooking and more! It was very quiet and peaceful at night. There was plenty of bedding and towels... We enjoyed our time there!
The neighbourhood is really great, very buzzing with lots of tree lined streets where you can eat out or drink coffee just a few minutes walk away. Its also right by Filopappou Hill, which is a beautiful park with great views of Athens at sunset, so we went up there to get our sun!