We loved the rustic, traditional experience - and the location was very central in Oia. The check-in experience was thrilling with a man grabbing all of our luggage on his own and racing through the crowds faster than we could keep up. He was wonderful!
The apartment it's self was a little musky/smelly for us, due to the cave layout. The farthest bed back in the cave was damp as a result. But on the plus side, it was always cool inside which is nice after being in the hot, hot heat!
Also to note, the bathroom is accessed right outside the front door to the unit. Since most doors use an actual key, it was an adventure to go to have to use the restroom in the middle of the night (unlock front door, go outside, go back to apt and lock the door again, etc.). Just a different experience :)
Aside from these notes, it made for a fun first stay in Greece with the traditional touches, hospitable welcome, and great location near the blue domes!