I am a digital nomad and work remotely. I stayed at Konstantinos' place for just over a month.
Location: firstly, the beach is about 50m, which in itself is enough of a reason. However, Kastraki is very out of the way from Naxos town (Chora), but if you're looking for peace and quiet (for which I was) this is perfect. Make sure you're an early bird, because there are early birds close by (roosters). Waking up to the odd cock-a-doodle-do is very good for the soul. Supermarkets are not that close, if you have a car, it is <5 minutes, but expect a longer 15 minute walk.
Amenities: as I need a fairly stable internet connection to work, I am always apprehensive when it comes to staying so far from a main town/city, but the internet was fast (sometimes better than my colleague's in London!). There is a washing machine so washing clothes was no problem and the kitchen is fully kitted out with everything and anything you might need.
Communication: Konstantinos is extremely helpful and accommodating. He was almost always instantly available and very informative if I needed to know anything. from the best to local soulvaki to car rental. Be sure to ask him if you need any service, he has very good local knowledge and might know someone that can help you with any query or service you require.
I would 100% return. I thoroughly loved every day I was there. There was nothing more wonderful than having a sunset swim watching the sun go down behind Paros.