We stayed three nights at "Kamares House" and had a fantastic experience. Anastasia's daughter Maria handled all the electronic communication leading up to the stay and she was very responsive and helpful. Our ferry from Crete ended up being more than an hour late (not unusual for ferry service, due to weather/sea conditions) but Maria was able to be flexible with our arrival check-in.
The apartment is about a 15 minute walk from the port, mostly flat. Our family of four (with two young daughters pulling their own rollerbags) had no problem reaching the address. There are no street signs or house numbers in this part of town so relying on google map coordinates (provided by Maria) took us exactly to the right spot.
Once at the apartment, we were greeted by Vangelis (Maria's father) who warmly welcomed us with cold waters, fresh cucumber and tomatoes, and some homemade cookies!
The apartment itself consists of a sitting/living room area, a kitchen, and a master bedroom. The sofas in the living room area can be converted into two twin beds (very comfortable) which is how we used it for our family of four. Vangelis and Anastasia set this up for us ahead of time -- be sure to let them know how you would like it arranged. The AC works well in both the master and the living room.
Finally, the location of this apartment couldn't be better for exploring Naxos town. The street is quiet but the immediate neighborhood has plenty of shops and cafes, and there are several markets and a pharmacy nearby. We enjoyed lunch at Maro's Taverna, which was recommended by Maria.
It's 5-10 minutes to the old town section and the fortress, 10 minutes to the Agios Georgios beach. We enjoyed nightcaps at the Vammos beach bar each night, which was cozy and friendly and plays great music.
I can't say enough about this property and the warm hospitality exhibited by Anastasia, Vangelis, and Maria. Highly recommended!