We stayed only one night in Case degli Avi in Modica, but it was a memorable experience for us. Our room consisted of three chambers, each of them on a different floor/level. The tiny but sufficient bathroom is on the top, the bedroom and a kitchenette on the middle floor and there is also a cave underneath with the real gem of this place - an opulent bathing room with grand stone tub. One feels like in a spa! Although you need quite a lot of time to fill and empty the bathtub the whole operation is worth the effort - you might treat yourself with a relaxing candlelight bath. There were plenty of candles provided for us.
The cave was inhabited by the citizens of Modica from the ancient times. You may ask Giovanni about the history of this place as it was his very own family who lived there for a few past centuries.
You might prepare your own breakfast at the apartment, especially because there are plenty of local food shops (great price for the value!) in the neighbourhood, but keep in mind that the kitchenette might be insufficient for bigger cooking. Fortunately enough there is no need to do so, as the restaurants in Modica are splendid and in addition to that cheaper compared to other Sicilian cities.
Last but not least, the host, Giovanni, is incredibly friendly and polite. We loved every minute spent with him!