We had a lovely 5 nights at Vincenzo's apartment. It's a well designed space. Great attributes include a balcony to watch the local action and a quiet terrace at the back. My sister and brother-in-law stayed for a night and we were only charged an extra 20 Euros.
Vincenzo was very helpful at all times especially sorting our luggage on the last day.
On nearby via Plebiscito you will find a buzzing local scene with barbecues selling artichoke, peppers, chestnuts, horse meat! A friendly bar (Irish Coffee), a great bakery (Al Dolce Forno) and various shops, one just sells eggs.
Just 3-4 minutes walk gets you to Castello Ursino which has the best weekend nightlife in the city these days. You are then just steps away from the main attractions, make sure you eat at the amazing fish market. Also treat yourself to a granita with brioche (Prestipino on the Duomo square). Never had a bad meal and it's relatively cheap. Get your culture in the monastery, the churches and the castello. Shopping on via Etnea. Lots of cool little bars everywhere.