We stayed at this wonderful cave house for 8 nights and combined 4 hours of working with exploring the island. Katerina is an amazing host and welcomed us with snacks and drinks. Everything is fully equipped and lovely decorated. wifi was okay for low quality videocalls. sitting outside at night with a glass of red wine felt like a wonderful dream there. it's a very quite and relaxing place.
After getting used to the bus system, we almost visited all parts of the island. the short walking way to the bus always felt like walking through a painting.
Katerina, her cave house and Santorini was worth the visit.