Michele's apartment is a really great place to stay while in Palermo. It was clean, and had several beautiful views! We were two people and the apartment felt large, with the two single beds upstairs I'm sure it would be comfortable for a family with one or two small children as well.
Check in was easy (with lockbox) and Michele let us keep our luggage at the apartment after checkout so that we didn't have to carry it around before our train ride. When we returned to collect it he even helped us carry it down (he's very strong!)
On the first night the air-conditioning unit was malfunctioning but he was very quick to fix it the next day. There were no cutting knives in the kitchen so if you plan to do a lot of your own cooking I suggest you bring your own. This was only an issue for us on for one breakfast since there is so much good (and inexpensive) food around!
The Ballarò market is really so close and I highly suggest your fresh veggies and meats come from there, Mercato del Capo is also very close. Cappadonia Gelati is delicious (and close) and for brioche and granita we loved Caffetteria del Corso : )
Enjoy your stay with Michele!