We visited (2 couples) Apostolos summer house in early August. We stayed there for 8 days ad's it was a great experience.
It is a spacious house, that accommodated easily the 4 of us. You have plenty of space outside, in the terrace and the yard, which was very important for us, due to the kiteboarding equipment we carried with us and had to wash every day.
There is plenty of space at the back of the house to park 2 or 3 cars.
You have a nice view to the sea from the terrace and the Grubbs floor and even better from the bedroom at the upper floor.
There are 2 bathrooms, one for each bedroom.
There is a 3rd bedroom (with a bathroom) in the basement, that we didn't use actually.
You can also have a fully equipped kitchen, which makes the house ideal for a family.
We also enjoyed the privacy, the house offers.
The house is very close to the beach of Plaka, we used our car actually but it takes only a couple of minutes to drive there.
For those who have never visited Naxos, Plaka is maybe the best spot for swimming and you can find many taverns ad's bars mercy to the beach. So you don't have to travel at all, just to go to a nice beach. It right next to you.
Communication with Apostolos was easy and quick, for any question we had. I enjoyed his flexibility and responsiveness.
Generally it is highly recommended to everyone who wants to rent a house for his summer vacations.