I recommend Ouranias place without reservation of any kind. You could not ask for a better place in Athens. It is one minute to the restaurants and market square, 10 minutes walk to the Acropolis Museum, and has a great view of the Acropolis from the roof. All this and her place is quiet as its on the back side of the building. Ourania's apartment is a home, with every comfort you could want, including a fully equipped kitchen and a washing machine. It is spotless and has an elevator and great wifi. She welcomed us at the apartment and left us tons of groceries so we didn't have to worry about breakfast. This was our best airbnb experience ever! Stay here! It will add so much to your Athens experience!