First of all, Elias was a really great host. He welcomed us in his office and gave us all the tips we needed to know about the whole island and what to do along with a map plus many notes. He was kind enough to bring us back to the central bus station with his car.
The apartment was really clean and as described. It was a bit humid as expected from a cave style but with the dehumidifier, it wasn't a problem! The kitchen is minimalist but has what you need to save you some money if you don't want to go to the restaurant all the time. For breakfast, you can pay 7euros per person to have access to a buffet style breakfast. The place is runned like a small hotel, by this I mean they clean the room everyday and change the towels.
As many other reviews noted, we had issue with the wi-fi too and at one point it wasn't working at all so we asked Elias about it. He said a technician would come next day and then everything has been working much better. Sometime the wi-fi still struggle a bit but it may be due to the cave or the island but it's not too bad.
We had a great experience in Santorini and this Airbnb was part of it. I would definitely recommend this place... thanks again Elias!