Can't say enough good things about this place. We took the bus from the ferry port to Vothonas and Spiros was nice enough to pick us up at the bus station (otherwise we probably never would have found our way!).
The place is built right into the hills, as is everything around, so beautiful and unique. It is a bit confusing trying to find your way up and down the stairs to and from town! Make sure you do it in the daylight and memorize it! On our first night we came back in the dark and got completely confused and thankfully Spiros came and found us. The next day we paid very close attention the routes so we knew where we were going!
The place itself is absolutely beautiful. You'd think being a cave home it would feel dark but just the opposite it feels bright, comfortable and cozy. It was also well equipped and they also stocked it with some items for our arrival (such a nice touch).
Spiros's entire family is so nice, friendly and helpful! Lastly, the only thing we knew about Santorini was Oia and Fira so we had no clue what to expect. Vothonas is a little gem in the middle of the island, nice and quiet and doesn't feel overwhelming touristy like the other places I just mentioned. You'll definitely want a car for at least some of your stay to property tour the island. They can set this up and have a car dropped off and picked up at the unit (very convenient).
We wouldn't hesitate for a second to stay again!