The flat is very easy to find, as it's a 5 minute walk from the ferry port. It is a great base to explore Naxos or to stay in the downtown. there is a bus station a 5 minute walk that will take you around the island to places like Plaka beach or Mount Zas. You can walk to the Temple of Apollo, and two spots for swimming are along the way. There are countless restaurants to choose from.
The flat is spacious and clean. It has a little balcony where you can see the water, as well as a little dining area and kitchen.