Everything was absolutely great. First of all, Alverio. He is a fantastic host and he gave us so many great tips of where to go, what to do and, the most important, where to eat. We had a great time in Siracusa mostly thanks to his hints.
The flat is located in a very convenient area, close to the marina and to the main street, also very close to the old town, Ortigia (with views of it). There are many supermarkets close to the flat and also local bars/restaurants. Also super easy to park in this area.
The welcoming was great, with a welcoming basket with some Sicilian delicacies and a useful tour around the block.
And the flat itself... oh wow!! It has all the amenities one needs - and all very tech, modern, new. And the room, of course, has a super comfy bad and a nice jacuzzi (which is super useful after a day walking around).
So, I can only recommend a lot this place and want to say thanks again to Alverio for everything. I already want to come back to your flat. :-)