I stayed at Dimitra's flat for 4 nights with my sister and had a great trip. The flat itself is truly beautiful. The bedrooms are comfortable and you can keep the rooms cool during hot summer days with the aircon. The flat is also located next to a bakery, a deli/market and a fruit/veggie shop, so it's a perfect spot to do local shopping.
The area is a really interesting artistic part of Athens, full of restaurants, bars and cafes.
It's about a half hour walk into the centre of town, or a short trip on the metro.
I'd highly recommend Dimitra's flat!