In short I recommend it to people with a low budget.
Here are some details:
It's a 10 min walk from the center and two windows have a nice view over the hill. A nice little apartment with some nice-to-haves like shampoo, soap, sugar-salt-cofee.
The host does not speak English so communication via telephone / up close is almost impossible. However she is very responsive in the automatically translated airbnb chat.
We learned that the hard way when the location airbnb provided for the house turned out to be really different from the real one. According to the host that was the first time it happened.
Also because houses in that area use pumps, for some arbitrary reason, if you try yo use too much water the system jams, and you don't have any water. To fix this, you must turn all taps on, turn off the pump, and re-enable it after half a minute, let the taps run for a minute and all is good.
Another unfortunate thing is that we counted on the washing machine (clothes) which during our stay was broken and had been removed for repairs.
Finally one small leg of the folding bed/sofa broke off when we tried to set it up (we can only assume it was damaged by previous visitors). The host was understanding and let us use a bed in another room of the same building. Unfortunately the matress was wrapped with plastic and the pair didn't have a good night's sleep, but we appreciate the effort.
All in all it was the cheapest airbnb we could find in Ragusa for 4 persons so we can't complain too much.