We visited in November during the low season. We had a really nice stay.
The hot tub was warm and the space and really clean, with cleaners coming each day to freshen up.
The location during this time proved a bit challenging as it is quite a walk to Thera which was the only place where things were open. So I would definitely rent a car if we are choosing this accommodation.
We felt it was on the costly side and weren’t sure it was worth the value but that might just be Santorini in general.