Fantastic place. Very clean and spacious. Niki is a great host and always available to answer questions and make suggestions for tourist attractions. All attractions are in walking distances. Lots of restaurants about 50 meters away. Acropilis North entrance is a 5 minute walk. We would highly recommend Niki's place.
When we arrived Niki had goodies ready for us to eat and had water in the fridge for us.
The place is located in Plaka which is a great place to stay. One does not need a car and can walk to all the attractions.
We would stay here again if we visit Athens