Overall recommendation: Definitely yes!
Location: For us, living a bit outside of centre was great, because it was quiet and we had a beautiful view on the sea, island, the rest of Catania and the Etna herself :) It is 20 minutes walk from Piazza Duomo.
Apartment is really spacious, for 2 people is far morethan you need, 4 people would also fit with no problems. All rooms are clean, you can feel some special oldschool climate inside with old wooden furniture, great seashell and glass collection.
Neighbourhood is quiet and friendly, there is a school over the street, so if you rent a car, better park it wisely.
As we (me and my gf) arrived in Catania, their parents and Desiree took us from the airport. They combine different languages (Italian of course, some French and English). We were greeted with local specialities on the arrival, contact with hosts were quick, responsive during all the our stay. Also they transported us back to the airport on our departure, which saved us a lot of problems. Giuseppe was not there, but for us it didn't matter really :)
So to sum up, it is a great apartment, and for that price you won't find better place in Catania :)