Amazing !
Apostolis windmills is a beautiful place, and we loved our stay there. What to say, first the host : Akis. He is just the nicest and helped us out on everything, from the pick up and drive back at the airport to the ATV rental and finally the "cool" places suggestion which we loved. He is available even in the evening if you need anything !
Then the location. The apartments are all in this typical white colour and the place is just looking so unique, like a small village with its own church (looking fantastic) and the amazing view over the sea and the Psarou bay.
I highly recommend the apartments, you have the necessary items available, the location is not too far from Mykonos or many beach but I would highly advice to rent a scooter/ATV to go around the island (you have free parking in Apostolis windmills).