I visited Hildegarda's apartment with my parents last weekend. Before arrival, I communicated with Hilde to let her know when we would arrive and she picked us up from the bus terminal and dropped us at her place.
You will struggle to find a better located apartment in all of Ortigia, down a quite lane-way adjacent to the excellent market selling fresh fish, cheeses, pastas and spices. Perfect to nip out and pick up some produce for breakfast or lunch. Thee is also an excellent fish restaurant just off the main market called Divino Mare.
As for the apartment itself, it is quite small as you'd expect with such a location but excellently decorated, clean and with all essentials. Wifi worked without a problem.
We had a great time in Ortigia, such a beautiful little town and well worth a visit.
Thank you Hilde for your hospitality, I will definitely look to return!