We stayed at Gianni's place one night during our trip across Sicily. The accommodation is really nice and very cute. It felt like a professional designer has decorated it. It is also very family friendly. Our little, 3 years old, daughter enjoyed the baby bed very much and is still asking for it in the other places we are visiting.
You will have everything you need, or at least we had, and you will be very close to the cathedral, about 600 meters from the house. There are small cafe's and restaurants there as well.
Gianni's mother welcomed us to the house and Gianni was in touch with us before we arrived. Although, we arrived later than planned, we were welcomed warmly and everything was as expected.
In the accommodation there is a lot of info about Ragusa, awesome old town, and Gianni's mother was also helpful with some advises for the visit in the old Ragusa.