We have been in Naxos from 19 to 26 of July. It was VERY WINDY (up to 75 km/h).
Kastraki area is under construction, a place which will be very touristy in a couple of years.
This means you have construction sites starting at 8.30 every morning, Monday to Saturday.
The super close beach is lovely: few sun ombrellas and a very low quality and expensive bar, but 99% of the beach is just empty and wild. The sand is gross: with average winds it is impossible to stay there, or in southern Mikri Vigla beach (where the tavern is, not where the kites are).
You will need a car: the isle is small, but distances are huge! Please avoid ATV.
The Maisonette N.2 is clean, part of a little condo with a central common area, so your stay really depends on the people around you. We have been lucky enough.
Parking is not clearly indicated, but there's pleny of space and we didn't feel the need to ask.
Cleaning is maniacal: every two days you are asked if they can come and it fits with your schedule.
I need to add one detail, which is not in any case a fault of the guest: the Maisonette 2 is positioned in a way the winds coming from the north create a sort of vacuum in the master room, so no air exchange is possible even if the outside temperature is 21 degrees. I've tried everything. You will suffer the temperature a lot during the nights. Still, you have AC.
Host has been present, but invisible. The feeling is that he/she/they answer very quickly to specific requests they think of being acceptable. But really nothing to complaint.
Side note: Depis Apartments have also a car rental service, the Zoulis: I would definitely not recommend them: they refuse to give full car insurance and strange accidents happen to the car when it is lef alone in the Chora.