Adriana´s apartment is convenient if you want to stay in the city center. There is a supermarket nearby. You can even go by walking to the principal streets such as Vía Etnea or the Central Station, where you can buy some tickets to journey to other villages.
Adriana and her daughter are nice people and they worry about all little things. So they are really good hosters. I´d recommend it.
PS: just a piece of advice - if you go in winter take with you some winter clothes because the house only has an air conditioner in one of the rooms.