We had a really lovely stay in Ortigia in Jennifer's apartment. Everything on the island is within easy walking distance and the apartment is stylish, comfortable & clean. We particularly enjoyed having the market just around the corner, although there are so many lovely restaurants on the island, you probably won't cook. I would recommend researching parking & planning a meeting point a day or two in advance, as you won't be able to drive right up to the apartment. Much of the island is pedestrianised.
Jenny couldn't meet us in person, but her friend Donna met us & showed us everything in the apartment & gave us some good restaurant tips, all of which we used in our 3 day stay.