I rented Deni & Geri house for 5 nights to visit Athens, my stay was amazing! Their parents live one floor below, they are very nice and friendly, great people to socialize and have a few beers with. The apartment is exactly what you see on pictures and described, can be easily housed a family of few even though I was a solo traveler.
Location can't get better than this, walking distance to everywhere, surrounded by many good cafes/restaurants, and yet the house is hidden in a small alley way which is nice and quiet at night. The rooftop is a big plus, there are chairs, a table even a refrigerator where you can keep your wine and beers cold.
I was very comfortable and slept well throughout my stayed, I definitely will rent Deni & Geri house again, thank you!