My girlfriend and I staid at Katerina’s apartment for 8 nights. It was by all means an amazing stay. The apartment is comfortable and very pretty, with all possible amenities. It is less than 10 minutes walk from the beach of Agia Anna, and only 15-20 minutes to the beautiful Plaka beach, which I cannot recommend enough. We explored many different beaches on the island and we kept going back to Plaka.
Katerina, who was staying in an apartment close by, was the best host ever: she made us feel at home all the time; she was warm and welcoming and at the same time very discreet. She gave us great tips on how to best explore Naxos and suggestions for beaches and restaurants.
The only tiny “issue” that I can think of is the fact that the bedroom window was just on the main road in Agia Anna, so we could not leave the window open at night. This is not a problem if you like to sleep with the AirConditioning or with the big ceiling fan that is in the bedroom.