I only have nice things to say about this Airbnb, and the host Sofia!
First, the location was perfect. We were close enough to the main town while still feeling like we had a place to escape from the busy streets. The apartment is at the top of a range of steep-ish hills, so we absolutely needed an ATV to get to it, and to get around the island. This elevation also meant that the views from the apartment were spectacular, especially at sunset! Honestly, even just the view would have justified the price for our stay, but we were so happy to find that everything else about the place was equally worth it!
Second, Sofia was the most attentive host--she responded promptly to all of our questions, and even helped us arrange our ATV rental with a local company that included transportation to and from the airport. Once we arrived, Sofia also sat with us and gave an overview of the best spots on the island, depending on our interests.
Lastly, the apartment itself was comfortable, quiet, and spacious. I can't think of a better way to spend a few days in Mykonos! Highly, highly recommend this place.