I was there for one night and i have to say that the house is just perfect. It is located in Imerovigli, in my opinion the best place of Santorini. It is close to the hot spots, but at the same time, it is far from the crowds of tourists, so you can easily relax.
The apartment is perfect for a couple, it is very cosy and you can get hypnotized by the astonishing views of the caldera. Just AMAZING.

Of course it is not cheap, but quality costs money... :)

I would undoubtedly go back again.
Jaime