This house is quite nice. The location is fantastic. The caldera view is tremendous. While it's located right in the heart of Oia, it's at the sunset viewing end of the main drag, so except for right at sunset, there's not much traffic going by the gate at the upper deck, so you always feel a sense of privacy. The house itself is as pictured and meets and/or exceeds your expectations except for a couple of items noted below.
My wife and I stayed for 3 nights with our 2 adult daughters. The house was very comfortable for the 4 of us and probably could've handled 1 more if not 2 with the extra sofa/beds in the living area, though that would've made it much less comfortable.
Our host Maria was fantastic. She was proactive, responsive, and very accommodating. She helped us coordinate rides to and from the airport, our luggage, restaurant and other local recommendations, a sunset sail cruise (at the last minute), a rental car, and anything else we needed. Even when she had gotten sick and was at the hospital, she didn't miss a beat if we needed anything.
We have a couple of complaints about the house that kept us from giving it from a 5 star rating. The first and most major is that the water pressure, which in the AM between around 9 & 11 was actually non-existent. There were literally single droplets of water dripping out of the faucets and shower heads (no exaggeration). I can appreciate that Oia is lacking in infrastructure and is getting over built and I've read a couple of other reviews that mention this pressure issue, but considering the price, and the fact that the house right next door did not have this issue according to the renter we met there, it should be disclosed as an issue, or corrected somehow. Not being able to shower, or even wash your face/brush teeth in the AM is a major issue. Maria and her crew dealt with it the best they could and provided us with many cases of bottled water which we used to bathe with when the pressure was such. The second complaint is that the hot tub is not really a HOT tub. The heater doesn't work and the jet button was broken, so while it's refreshing to get in during the day when it was hot, in the evenings when it was cooler, it was an issue. Apparently it's a long standing issue as I read other reviews that mention it, but the "we're waiting for a part from Athens" excuse, considering there are multiple flights and ferries daily, is just that, and excuse. To compete with the top tier homes price being charged, this should be fixed.
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Those issues aside, and with the attentiveness of Maria and the other staff that helped with luggage, and cleaning, the place was great and our Santorini experience very positive.