We stayed two nights at the Lost Iguana. The room was beautifully done in a rustic style, and quite comfortable. But we were simply blown away by the view. When it was not cloudy or foggy (which it was a bit more than we would have preferred) we had an amazing view of the volcano. I haven't had a room with a view like this Mena House in Cairo.
The resort is a tad remote, so unless you have a car/taxi, or are on an excursion, you'll be dining at the resort restaurant. That was not an issue for us, as we found the food to be quite tasty, especially their soups. The breakfast buffet did vary a little each day as well.
Combined with the pleasant demeanor of the staff, we would definitely return given the opportunity.