The apartment is at the center of Ortigia, so you'll be able to walk everywhere. If you come with your car, I recommend parking in the Talete Parking lot, it's only ten minutes away from the apartment, costs 10€ a day and you don't have to enter the ZTL.
The room is pretty small but very comfy, and Lidia provides you with everything you need. She's very nice and will gladly tell you what to visit in Syracuse. Wifi doesn't work really well but that's not very important.
I had a great stay at Lidia's place, I recommend it!