Kivotos is a stunning property, just a few months old so still in superb shape. Not your typical Santorini hotel as you can see from the pictures. The staff are exceptionally warm and friendly and everyone of them went out of their way to meet any requests we had.
The restaurant attached to the hotel serves really great food, albeit a bit pricey. I'm a vegan, with various intolerances and whilst the menu was limited for me, the staff immediately offered to cook off the menu to accommodate me which Buddha Bar wouldn't do.
The location is quite busy with it being enroute to Skaros, the rock which everyone wants to walk to. But don't let this put you off as I would say anywhere in Santorini is busy, unless you're in the middle of nowhere. We walked to Oia from our hotel which I would recommend, its was a 90 minute walk there and 2 hour walk back as its a little uphill.