It is a lovely location, high up in the old town overlooking the valley with the city. We had unbroken blue sky for our stay 4 nights in November. At dawn the sun rise behind the cathedral and shines straight onto the terrace and into the sitting room. Sunsets splendid. Being November it was quiet in Modica Alto but pleasantly busy down in Basso. Some eating and drinking places were shut for an annual holiday, unfortunately. Excellent dinners at La Contea, Cappero and Locanda dal Colonnello. It is a very good base for excursions to Sampieri, Noto and Ragusa.
We suggest you follow Olivai's arrival instructions - we didn't ! Satnav doesn't work very well in the alleys! Park if you can close to the hairpin bend that Olivia marks on the map and walk from there is easy.