Nikos and his family run a very nice and quiet place. They answer all your questions very kindly and provide very good advice to visit the island. They can arrange your car rental for 25€ per day (prices for May, the car is waiting for you at the hotel) and the transfers from/to the port are free.
As for the studio itself, you can rely on the photos shown : it s a double bed room with bathroom and kitchenette and a balcony. Some overlook the pool, others overlook the quiet front road. It s quiet, clean, the wifi is ok but not so fast.
There is hairdryer, and the kitchen is well equipped. You ll have to buy coffee, oil, salt and pepper at the supermarket (2 min away by car, so is the bakery) if you want to make diner or have breakfast on your private terrace.
It s a very good choice if you stay in Naxos for a few days