The location is absolutely incredible, and it is undeniably cool to stay in a cave (both figuratively and literally—the cave portion always stayed quite cool, even during hot Athens summers). The living area and kitchen are very comfortable. Steven was fantastic and arranged multiple car transfers for us with his great drivers.
The only downside is the bathroom, which is an odd arrangement where the whole room is a shower. That means the toilet gets wet every time you shower and needs wiped down afterward. It also means that, as happened to us, if the shower drains too slowly the whole bathroom floor is covered in an inch of water. Steven came and fixed the drain promptly, but the drain slowed down again after another day. Very uncomfortable to have to use the toilet or bathroom sink while standing in an inch of scummy water.
Due to the bathroom issue, it’s not for everyone, and is probably best for a couple. Everything else aside from the bathroom was incredible and overall we really enjoyed our stay, especially being just a couple minute walk from the acropolis!