This is a mini-apartment. It is quite spacious. The room was also well designed. It was on the other side of the caldera so you will not get that view. However, the caldera is a few minutes away by foot. It is situated in Imerovigli which is one of the recommended places to stay on the island and apparently has the best sunset views. It was also convenient to Fira.
The host is still slow to respond but when I reached out to Airbnb, they were able to put me in touch with them and provide me with a telephone number.