This is a wonderful understated location just outside Oia. It has a slightly more pastoral feel with a small vineyard out front and a small vacant lot/field next door with a church below. If you don't want to be crammed into a hillside surrounded by hundreds of other tourists, this is a great spot. The sunset view fantastic. Lots to do and see on Santorini, but the cave suite and patio are a great place to relax in peace.
The host, Helen, is very helpful and responsive. We arrived at the early and decided to taxi instead of taking the public transit bus with our bags. Helen had offered to arrange that for us, and we recommend taking her advice. The port was a zoo! Just arrange the taxi with Helen and don't worry about finding one yourself!