We had a great stay in Francesco's apartment! The communication was easy and pleasant and Francesco was always very helpful. The apartment is centrally located, all important and worthwile places in Catania (including the train station) are within walking distance. There is a market where you can buy fresh fruit and vegetables very close by and a supermarket about 5 minutes by foot. Right in front of the apartment there are parking spots that you have to pay for, but if you're lucky you can find a free parking spot a little further down the street.
I will say that the kitchen is not exceptionally well equipped, but it's definitely sufficient for basic cooking (i.e. unless you're planning to cook a four course meal you should be fine).
All in all, I can only recomment staying at Francesco's apartment!