We stayed in Alessandro and Graziana place for a few days while visiting East Sicily and Etna. The apartment consists of kitchen, bedroom, living room, patio outlooking the sea shore and a small backyard. Alessandro and his wife met us at the property, explained everything, gave some tips on the local restaurants which were nice. They were very welcoming, left us some snacks and water as well.
The apartment is recently refurbished and looks very fresh and stylish. A lot of small thoughtful touches that make your life easier. I also liked that you can drink morning coffee and look at the sea. The village where its located is very small. But you can easily access Catania by car. Good location to visit Etna Nord and Etna Sud as well.
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For tourists visiting Etna:
We booked 2 tours to Etna. Alessandro suggested one guide who walked us around Etna Nord old craters. It's a very light hike. The guide was very friendly and told us many interesting things though we didn't go to the top (stayed on 2000 m or so).
The other tour we booked with the side company Guide Etna Nord to go to the Summit - the active craters (3340 m). Would highly recommend the experience. We started from Etna Sud and used cable cars for the part of the way as the weather was getting worse. This hike is med/high level of difficulty. There is an option to hike from the very bottom as well (which we would have used if the weather allowed).
In general I would recommend to figure out how high you want to go first and which parts of Etna to visit and then book a corresponding tour. If you want to go to the very top take warm clothes with you as its rather cold. You can also rent some near the cable cars.