We had a wonderful stay at the windmill, Virginia and her family have been really welcoming and nice, and the house had everything we needed. The mill is isolated on the top of a small hill, not far from the city center and the port, and has a spectacular view on the Cyclades and plenty of outside spaces.
Having a car is essential to enjoy all the many beaches and villages of the island. We rented two: since to reach the mill you will have to take a small dirt road, take, if you can, a car which in not too low. We had a Panda and a Yaris, they were both ok but with the Panda it was easier.
As for the wind, the island, and the hill of the mill, can be very windy, but we also had windless days. Sometimes, in the night, it got a little noisy, and we had napkins flying away while eating, but in general the wind is not a big problem (I personlly found it even fascinating) and lowers the temperature making it more enoyable.