We only stayed two nights in Cinzia house, but we could have spent there two weeks. The view is really stunning - a perfect morning starts with the sunrise over the sea. You even don't have to get out of the bed to see it.
In Winter, we recommend warm socks, as the floor was a bit cold. The kitchen is equipped with all basics, and Cinzia even left some food for us, so we didn't have to starve when arriving late.
We didn't meet her in person, but communication via WhatsApp was very fast and helpful, she is a very dedicated host. You will need her video-instruction to find the way, but better download it before arrival, as the internet connection on the hill isn't fast enough.
For exploring the surroundings, we recommend the Sentiero Saraceno. It is a lovely hiking trail from Castelmola down to Taormina.