We spent a very good time at Dimitris place. The location is really great, a small apartment on the roof (7º floor!!) of a very centrical building with an amazing views of the Acropolis.
And Dimistirs is a great host, helpful and friendly. He was very aware that we were comfortable all the week, even he provided us with two bicycles to ride around the city.
Sure if we come back again to athens we stay at dimitris apartment. Very good value for money.