Mario and his team are extremely reactive and available, thank you to them!
The cave is perfectly in accordance with the pictures and the experience is worth the detour.
However, we would not stay longer than two days ... one week was too long for us, the comfort remaining relatively spartan (functional kitchen but equipped with the bare minimum), humid air despite frequent airing, a lot of noise when the sea is agitated or when boats are partying just in front of us.
All in all: a nice experience, but for a short stay!