We booked a 2-night stay on the Matter suite. The views on our private terrace is amazing with perfect sunsets in late March. The breakfast is excellent. It is preordered and delivered to your terrace in the AM. The hotel is typical Caldera facing, cliff hugging buildings, with stairs that lead up/down from the walking pedestrian area to the suites. We traveled light so cannot complain with the stairs. If you have children and large bags, it could be challenging. The location is safe, and private. It is a short walk from the Fira Bus station. The staff at Classico Restaurant was kind enough to show us where the private entrance to the Asha suites is..
Our suite is right below the restaurant, so we could hear some chair dragging until before midnight. From Fira, it is a short bus ride to both Oia and the airport. If you can travel during the shoulder season to Santorini, book this hotel as the prices go up during the peak summer.
Overall, we loved our stay, and made lifetime memories.