We had a great stay in Castelmola! Alberto is a wonderful host: responsive, helpful, and generous. He showed us around Castelmola and gave us great recommendations about the place. The house is in perfect condition and had everything we needed! We didn't have a car but it was not an issue as local buses work well (just make sure to check the schedule).
Lovely views from Castelmola and Monte Venere. Castelmola is also quieter than Taormina (less tourists), particularly at night, which we appreciated!