If you are coming to Naxos off-season, this is a great place to stay! And I can imagine it will be great also in season. Central location, one minute walking distance to traditional cafes and bakeries. 3 minutes walking distance to the port and its restaurants and cafes, and a very nice bar/night club is just 50 meters away. The apartment is in the heart of the old town but not very high up, which make it more accessible for people who don't like walking uphill.
Evangelos was very helpful and responsive. Apartment was very clean. Can't think of anything that was missing or less than expected/advertised.