I enjoyed my stay there a lot. There's really nothing I could complain about. On the contrary. The welcome was very kind and helpful, communication was easy (WLAN worked very well) and the house was clean and is equipped and decorated with thought and in a style I really liked. The outside area is also comfortable and inviting. I visited in November, so on some days it was too windy to stay outside. But there were days when I got a feeling how nice a summer there would be. All in all, a recommendation without any exceptions from me.
Living there a (rented) car is definitely helpful. But I found driving around and the traffic on Milos fairly unproblematic. Aside from that the surrounding area is worth visiting as well and Sarakiniko just a small hike away.