Would highly recommend for anyone traveling to Naxos. The location is very convenient to the center of the city depending on your itinerary. Alex was very hospitable and allowed us to store our luggage in a safe place during both check-in and check-out as we were overlapping with coming guests. He even helped to arrange a taxi for us when we first arrived to make sure we could easily find the house. The house is very easy to get to/from the port and is very walkable even with luggage (though there are some hills and stairs so be mindful). We took a taxi to get there and Alex met us to walk us up and then we walked to the port when we were leaving. The entire process was super easy and very convenient, having never been to Naxos it was a relief this process was convenient.
The house is very clean, modern and well kept. It was just two of us but you could easily sleep 4 (5 tops) comfortably as there is a full size bed + two extra single person day beds and a couch split across two levels. The view from the rooftop is lovely overseeing the entire port and ocean. Sunsets are highly recommended to sit with some local wine and enjoy the evening. The morning breakfast selection is excellent and a very nice offering for staying guests which is not common in other places we've travelled. The house has all of the things you would need: plates, cutlery, towels (though bring your own for the beach!), coffee/tea, fresh juice and fruit. A large jacuzzi tub I'm sure would be a delight though we did not use it ourselves. Wifi is solid and connects upstairs as well.
Getting to the shops, beach, etc are all highly walkable and really the only way to easily get about within the city center. Renting a car is easy if you want to take day trips outside of the city and there is a private parking spot but make sure you get a small car and are a comfortable driver squeezing into underground facilities. Alex had a load of recommendations for us though we didn't do as many as we should so you could definitely stay in the city center and explore from there. The are restaurants, shops, etc all right below the castle where you're staying. Its highly convenient and for us a was a perfect location to make things easy for our stay.
We really don't have any complaints, our only recommendation might be to setup the tv with streaming services as an extra bonus for foreigners wanting to veg in the evenings with english content. A small map for walking from the port to the house posted on AirBnb once the reservation is confirmed (maybe I missed it?).
Overall the communication was excellent, our stay was relaxing and we would surely return!