The cave house right on the port of Armeni is a very cool and unique experience, not to mention very nice to be slightly removed from the polish and craziness up the stairs in Oia. And you even have a nice little rocky beach where you can pop in the water steps from your front door (though water shoes are nice for this), and if you go to eat/drink the restaurant next door you can swim off their pier too.
However for transparency’s sake I will say the stairs to get to the bay are currently “under construction” as there has been a rockslide and leaves a narrow rubble path to cross on in one section, we did use this as the other option is taking a boat that leaves at 12:30 and comes back at 5 (so not much time to explore the island)
I also think the cave could use a bit of TLC, the paint was peeling leaving exposed cement to hold moisture - causing a quite damp environment.. tough to get towels/bathing suits to dry in there.. as well as some mustiness (mold?), bugs, and crumbling cement all over the floors. Though the front of the cave is beautifully re-done, it just needs to be expanded to the back!
This being said we really did have a lovely time here and with a couple touch ups would be a 5 star experience!