We were completely impressed with everything at Caldera Memories. The staff, Yiannis and Loukos, went out of their way to help us with restaurant recommendations, reservations, transportation to the airport and neighboring towns, and much more. We were extremely fortunate to experience the hotel and area in June, just before the return of tourism and high season.
The view is indeed breathtaking, and Imergovigli was the perfect choice, away from all the people of Fira and Oia. However, it perhaps is not for people who don't want to walk a bit. The path into town is uphill and a bit rough to walk on without solid-soled shoes. At night, the only light to guide you is your own flashlight, so be sure to bring your own or a cellphone that has enough battery. It's difficult to negotiate it both downhill in the dark and uphill in the heat of the day. We found it worth it in both cases, to find affordable dining.
The swimming pool was wonderful and I used it alone every day of our stay. We had several hours between check-out and our return flight, and we were able to relax in and at the pool, then shower and change in the public area before leaving. This place has done it right!