We liked our vacation at Santorini and especially the appartment very much and would recommend it fullheartedly.
It is placed a few 100 meters up the hill in the middle of other houses. So you have to accept that the neighbors/ other guests in all directions are just a few meters away and also are the chickens of the neighbor. In October there were not many guests left so no issue for us. But if you like it quiet and privat I think Juli/ August is not the best choice for you in this appartment.
We had absolutely no issues about the jacuzzi on the roof as other reviews have mentioned. It was nothing but fantastic and, for us, one of the main features why we booked the appartment! If we wanted it to be a few degrees warmer we told our host, and the next time the pool guy was here he adjusted it. Which was sometimes twice a day. Somebody mentioned the neighbor deactivated the jacuzzi. I think that was the pool guy who stopped it over night, because of the guests in the neighbor house, which was understandably to loud over night.
Sitting in the pool with a view of the hill with windmills ,the sea or the stars above you is perfect!!! But keep in mind you are not in an absolute privat area with all the houses around you just a few meters away.
The appartment itself was nice, especially the dark painted bath. The kitchen was well equipped (nespresso coffeemaker if you want to bring your own capsules). It was clean and we got two times a week roomservice. Not just new towels, a complete cleanup.
If we had any issues or questions our nice host Anastacia responded very fast and was always helpful. She did a real great job!