Stop browsing and book this apartment. We stayed for 5 days in August 2013 and will certainly be returning. Clean, comfortable, spacious, well-equipped, perfectly located - this apartment is great value. Giorgio's parents, Angela and Carmelo, could not have been more helpful. Lovely view from the front, and car parking (free) in the area immediately outside. There's a marvellous market 2 mins from the front door.
Ortigia is a stunning place, not to be missed. It's relaxed, friendly, safe, and stuffed with history and culture. You can swim off the rocks (about 10 mins walk), take in the architecture, mooch in quirky little shops or lounge about in cafes and restaurants. Wish I was still there!
Useful things to know:
Apartment has everything you might need, from superglue to olive oil. Digital MP3 guide of city provided free.
UK 2pin USB converter for iphone didn't fit sockets. Buy one in the stalls outside apartment instead. Similarly UK cigarette lighter charger wouldn't fit our Sicilian hire car (Fiat Panda). Get one locally.
Adjacent building, covered in scaffolding, almost put us off. This is renovation of old Post Office into plush hotel. Work has been stalled for months, so nothing going on while we were there. Side of site nearest the apartment is already complete.
It does rain in Sicily, even in August. We had two huge downpours - but not for long. Shut the shutters at night!
Very effective aircon in the two (huge) double bedrooms. The two other bedrooms (one twin bedded, one single) have fans.

Now book it. Enjoy.