I won't repeat the wonderful reviews, because they're all very true... except the view. There are no words for that majesty. You just have to see it yourself.
However, here's a tip for those coming from a ferry at Thera port: I highly recommend you have the host arrange to pick you up at the port with your name on a sign, drop you off at the closest possible place to the apartment, arrange the porters to carry your luggage & vice versa for the return.
Few things more confusing & frustrating than arriving at a confusing/chaotic port such as Thera. But, if you just let the host take care of all arrangements it'll save you some (not all) of the grief.
Even if you spot the place on Google Maps, it's still pretty challenging finding the closest drop off point & carrying your luggage through the tiny stairs & hallways. So, just hit "neutral" and let the host (in our case the wonderful Giotta) take care of that part.
Once there you might have to shoo away pesky cruise ship travelers, annoying influencers & confused trespassers from your front gate. It's just so central & picturesque, you can't blame them for wanting to take a photo from the front gate. Just know you might not be alone at all times because of them.
Often we would watch those idiots perch themselves at the castle a couple hundred yards away, just a few steps from doom & certain Youtube fame. Not for the faint at heart.
Otherwise, absolutely stunning. There were 6 in our group, all were comfortable. Highly recommended.