What an amazing place to stay in Santorini! My wife and I stayed for a week at the Envision unit. It's more than big enough for 2 people and it has a high ceiling so it feels really light and airy inside, despite being a cave house. The decor is very nice and the place was sparkling clean. The outside terrace is amazing! We never got tired of those sunsets :-) An even though there were guests in other units, we often had the terrace just to ourselves. The location is also perfect for exploring the island - the unit (and Firostefani in general) is far enough from the busiest tourist areas but there are still plenty of restaurants, bars, shops and it takes less than 10 min walk to the center of Fira. There is also plenty of public parking nearby. After exploring the whole island for a week, we decided that this was definitely the best area to stay in :-)