I highly recommend Vincenzo's place. First, he's a super host - attentive, available, and friendly, and his kindly aunt is also around to help when needed. Second, he's done a magnificent job of fixing up an old iconic Italian 4 floor hillside home. It feels like you're in a world apart, yet all the amenities are there to make you feel comfortable. All the furnishings, cookware, and appliances are super clean and functional. And best of all, there are views of Etna from every room, especially from the spacious roof deck where you can eat breakfast and watch the sunrise, or enjoy a glass of wine and watch the sun go down. Castiglione is a quiet hill town so it's a great respite from the crowds of Taormina or Siracusa. There's plenty of outdoor activity in the area as well as churches and castles in town to wander through. Great food too. Down the street is a friendly, offbeat winery - Vitis Vineria - which serves an incredible antipasto as well as selected pastas and main courses. We ate there three times, and you can buy some artisanal local products to take home with you. Another wonderful "slow food" osteria is Cave Ox in nearby Linguaglossa.
Vincenzo's is one of the top Air BnBs we've ever stayed in. We were lucky to book it when we did. Ci vediamo Vincenzo!