We stayed at Roberta's place for 3 nights and absolutely loved it. It is situated in Ortigia, close to the beach, shops and restaurants. It's in a quiet area of the old town which was also nice.
The apartment was clean and had everything we needed to do our own cooking, so we didn't have to eat out every night (and get soaked venturing out during a thunderstorm!)
The little balcony was a bonus to have breakfast and a glass of vino.
I would highly recommend Roberta's place.