I recommend this place 100% if you want a great view of Etna's eruptions and lava flow. You're also a 15mn walk to the city center and teatro greco.
Giampiero is an excellent host, very nice and helpful. The appartement is spacious with 2 double beds, 2 single beds, a big terrace, kitchen and living room.
I think it would be perfect for a family vacation or a group of friends. If you're lucky you will catch a glimpse of the turtles living in Giampiero's backyard :)