We stayed in Sotiria's appartment for a few days and I have to say we really enjoyed our stay. The appartment was very clean thanks to Sotiria and her mother who cleaned it upon our arrival. The appartment is also very spacious, cozy and lovely. Pictures truly don't do it justice! It is situated in a calm area, but two streets down you can find a lively neighborhood with all kinds of stores and supermarkets. You can also find museums nearby and the Acropolis is only a few minutes away by taxi (taxis are pretty cheap in Athens!)
Sotiria was a wonderful host who was constantly available if we needed any help. I would definitely recommend staying at her place. You won't regret it!