This little enclave is in the heart of Oia right by the iconic blue domes. Our family of 6 (2 kids) were very comfortable for our stay for a week in July. Nick and his team were extremely accommodating to us during our stay, even booking transport and dinner reservations. They are very knowledgable of the surroundings and gave good advice.
The stunning view here seems like something from a movie set as it's so beautiful that it seems fake. Banff, Canada is the only other place I've been to that gave me this impression. It is so peaceful to wake and see the sunrise and boats moving along in the blue water below. We used the "hot tub" as a pool during our stay and it helped us cool off and enjoy the patio while hanging out at the villa. Though the space was small, we seemed to have a place for everything. We especially loved the Nespresso machine (and complimentary capsules). The cave house is very well insulated, so we were cool at night. And even thought the street above us was bustling with activity, it was quiet inside, which ensured good sleep.
I wouldn't advise anyone with accessibility issues to stay here. There are about 30 steep steps down to the entrance. The host provided porters that carried our luggage up and down. But each time you come and go, the stairs can be tricky as it was for my dad. Please also note that when staying here during peak season, the photography around the patio gets a little out of hand. Many people are flat rude even though they aren't respecting your privacy as a paid guest. Pack your patience in the summer.