Dimitris' space is absolutely perfect. Such a unique & luxurious, yet humble abode. It was spotless, and I cannot rave more about the location. Don't waste your time staying in any other part of Athens- the Gazi/Keramikos area is such a gem & a quick metro ride to all of the staple Athens spots.
Some recommendations if you stay here- take the metro from the airport- so easy.
& you MUST try Falafelinas. Just a few minute walk away from the flat and one of my favorite things I've ever tried.