Location. Views from the windows and from all over the hotel. Stylish design - cave minimalism. Swimming pool. Breakfast is perhaps the best in my experience. In general, if you are going to Cappadocia, and the price per room (I had the Triple Cave Suite) matches your income, choose this hotel, you will not regret it!
On the downside:
The equipment in the room is a little tired, in the bathroom - very tired. The jacuzzi didn't work. Poor internet speed in the room. Little greenery.