We had a great stay at Massimo's.
The apartment is super clean, spacious and with a great view of etna.
Massimo and his wife are super friendly, very responsive and easygoing.
The kitchen is well equipped (all nonna's utensils to prepare and eat pasta you will find).
Also, it is a nice neighbourhood where you can experience the real lively day to day in Catania (not only the touristic one). Around 600m down via Plebiscito great (and cheap) food (no tourist traps).
Definitely recommend !