Andrea's place was absolutely fantastic. A beautiful space, with the best view from a terrace I've encountered on airbnb. It is well worth the short climb up to the place (and necessary to work off the sicilian food!). Toni and his brother Fabio were always in immediate contact with us, and made every effort to meet us for check in and check out at our convenience. The place was perfectly kitted out for a stay, with everything that you need (including lovely soap and hair products). They also had great recommendations for restaurants in the area.
Modica itself is a lovely city, with lots of hidden alleys and corridors to explore. Be prepared for many stairs, as this city is very 3D, but perfect if you want a place that is a real gem but also a little bit quieter than the other popular towns in the region (we went to Noto and were very happy we didn't stay there). I'd highly recommend the city, as well as this apartment, it was the highlight of our trip!