First, let's get the most important part out of the way. The location of this property is absolutely perfect. The unobstructed views of the caldera, the sunset and the famous blue domes are simply breathtaking.
Note that you don't get to see the sun dip below the horizon as this aspect is blocked by the Oia castle. This is to be expected though and does not detract from the magnificence of what you do see.
Location-wise, it is very close the main street cutting through Oia, although you have to descend down a good number of steps to get to the property. This does not take much time or effort at all and is part of the charm of staying in Oia, but if you have mobility issues or if you struggle with steps, this might not be a good option for you. The benefit is that you are away from the main crowds and there is an air of exclusivity as the surrounding area is usually cordened off to non-locals. Which is great because you get one of the best views of the famous domes.
The house itself consists of a large sitting dining area. The main bedroom is large and set quietly at the back of the house. There is an a/c unit which can cool or heat the house. There is also a small toilet which includes a shower. It's a bit tight, but is fairly normal for these types of houses. The WiFi is good as far as we could tell. There is also a kitchenette which is fairly basic. There is a two hob electric stove but no oven or microwave. There's plenty of utensils and glasses and plates (not bowls), but not much in the way of pots and pans. There are almost no cooking condiments so be sure to bring our buy your own.
There is a nice terrace outside with multiple seating options (deck chairs, normal chairs, small bench spaces) and a large collapsible parasol. All work well within the available space, which is a little tight. There's a couple of outdoor lights though, so sitting outside in the evenings is perfectly fine once the sun goes down.
There is a further toilet outside (like an outhouse!) with another shower.
And, curiously, there is also another completely separate room which sleeps two comfortably. It even comes with a mini fridge. Note that the room does not join to anything else and opens only to the outdoor patio. The mobile signal in there is mostly non existent and the WiFi doesn't really reach it either.
Finally, it's worth mentioning that the communication with the property was fantastic. They were also very accommodating and they managed to assist with a late check out.
Oh, and there's a porter to help with your bags both to the house upon arrival and from the house upon checking out. Just remember to meet the porter at the post office, not the car park near the post office!
All in all, a highly recommended stay.