We stayed four nights in Raffaella's house, and I can't think of a better place for us. It is very spacious (much bigger than it looks on the photos) and it is comfortable. And it has a well equipped kitchen - which was important to us, since we like to cook our own meals, rather than go out to a restaurant every day.
The apartment is perfectly located in a small alley way, has a food shop and a nice cafe right around the corner, and is only a few minutes walk to all the sights in Ortigia.
But most of all: Raffaella is a fantastic host, that really made us feel at home. Whenever we needed something (whether is was information about parking spaces for the car, or finding a cheese grater, or finding a recipe to cook fresh mussles from the fish market), she was there to help. And it felt like she really enjoyed being our host, too.
We can highly recommend to stay at her house.