I cannot recommend Anna-Maria's property highly enough! It is absolutely beautiful; the location is perfect; the amenities are excellent; the balcony is fantastic; I could go on.
We were three girls and the space is great and very comfortable.
The Acropolis, the museum and a multitude of restaurants, cafes and bars are all within a 5-minute walk. Despite being this close to the action, the apartment is so tranquil and quiet, it's wonderful.
I would highly recommend staying at Anna-Maria's if you're travelling to Athens, you won't find a better place. In addition, there's an excellent wine shop, "Fine wine", within walking distance that does fantastic Greek wine tasting events - not to be missed!