What a fantastic place! The apartment is spacious, fully refurbished, has a new kitchen, bathroom, small balcony. The windows look out onto small medieval streets and the local church.
The town of Motta Camastra is also great, the views of Etna and the surrounding hills and town are truly amazing.
You do need a car to get to the town and bring your own supplies. The ride up to town is relatively steep and narrow, but nothing too demanding.
We didn't meet Demetrio, but his mother-in-law (I believe) showed us where to park and the apartment. She is very very friendly and nice, even though we don't speak Italian, we managed to communicate just fine :)