The good:
Nefeli Homes' location is incredibly good. The hotel is located in Imerovigli, a 30 minute walk north of Fira town. It has breathtaking and unobstructed views of the caldera and islands across, as well as south towards Fira. There are several restaurants, cafés, supermarkets and a pharmacy within a 5-minute walk.
The hotel and facilities are an architectural marvel of stairs, steps, hallways, arches, nooks and crannies, with rooms extending deep into the mountain, giving them a unique and cavern-like character. Our room for 4 had a wonderful balcony with views as described above. There is a small pool and several sun terraces with quality sunbeds and furniture. The entire property is stylish and tastefully appointed.
The staff are friendly and helpful and will arrange transport and recommend activities as your request.
Room for improvement:
While our room had a bar with a few hangers, there were no drawers or shelves whatsoever for clothing. There was however several good places where a closet or shelves could be installed.
The bathroom tap had 2 settings: off and firehose strength. The latter resulted in lots of water on the floor, etc. Also, there was no plug for the drain, so it was not possible to fill the sink with water.
The breakfast (see photos) is objectively worth €12-15, not €25, even by Santorini price standards.
These are minor issues, yet they were an element of nuisance, and in particular because each is easy to resolve.
Overall, great!