We had wonderful stay Sept 10-12: flat is beuatiful, clean, perfectly located when you want to enjoy Ortigia (old historical center of Siracusa). Mariela is extremely friendly and nice person, very helpful and punctual.
One comment re travellers with car - there is no private parking close to the flat. Taking into account that most of the center reserved for perdestrian streets and/or restricted for residents, it may be difficult to access it by car and the parking where you can leave your car is in 15 min walk (though, beautiful one, since it is promenade by the sea).