We enjoyed our stay in Daniele's apartment a lot! Castelmola is a beautiful village with a stunning view on the Etna (from the balcony!) and an endless amount of cute tiny streets to get lost in (in a good way). Watch out that your GPS does not send you up the walking path as ours did, it's very steep and at some point you'll get stuck and you have to drive off the hill backwards.. If you drive the right way, however, it's easy to reach Castelmola. Daniele has a parking permit so you can park your car in Castelmola near by the apartment.
The apartment was perfect, brand new and incredibly clean. There's a fan in the bedroom. There's a small outside space in front of the house, which is not really a terrace, but you can take some chairs outside and enjoy your coffee or drinks. Our only feedback is that the kitchen currently lacks a sharp knife, which would have made the cooking easier.
Daniele is a great host! The communication was very easy and he even helped us out via whatsapp during our stay. He even offered to drive us to Taormina one evening, which is very kind, but we chose to walk down instead (which was nice!). All in all a great experience, highly recommended!