Absolutely great experience! Even though we didn't meet Helen and Giannis, it felt like we were staying over at friends rather than in a vacation rental. They did so much to make us and our 19-month old daughter feel at home, including a well-stocked fridge.
The studio is extremely cute and has incredible views from the balcony and the porch. It's fairly compact (for 2.5 people), but given the amount of time we spent outside it worked very well.
The location was ideal for us: It's about 20 minutes from Naxos town and felt fairly secluded but not lonely. It's within walking distance of some nice beach spots along a "dirt main road" and was a good base for explorations around the island (we had a rental car).