What can I say other than WOW! This place is truly incredible. I didn't think the pictures could be accurate, but the site and the suite were even better in person.
The suites are on the back side of the hill of Oia and are maybe a 5-minute walk into town. While not looking into the caldera, the buildings have an absolutely stunning view of the Aegean toward Ios. It's a calm, restorative retreat from Oia, which can be a bit overwhelming with tourists admiring its jaw-dropping beauty! Honestly, you get the best of both when staying here.
Yiannis and Paz were incredibly helpful and responsive and were always willing to offer recommendations/make reservations for us.
If you're trying to decide between staying in a traditional cave dwelling in town or booking one of these, book one of these. It's heaven!