We stayed at Villa Giaggia in week 42, and had a wonderful time in San Vito.
The house is in a compound of vacation houses located in a quiet area in the outskirts of the city center (on foot it takes 6 min to go to the nice beach, 10 min to the Deco supermarket, 15 min to the main shopping street).
We enjoyed staying in the house and especially appreciated the big terrace, the gas bbq and outdoor shower, however during our stay there were a lot of mosquitoes around the house, so it may be a good idea to bring repellent :-)
It seemed we were the only people staying in the compound that week, so it was very quiet and private, however since the neighboring houses are very close on three sides I expect that may not be the case during high season. There was a nice relaxed end-of-season atmosphere in the city and there was plenty of space on the beach, but also several restaurants were closing down for winter while we were there.
The weather was nice for going to the beach most days and the sea was still warm enough for a swim. Would recommend Villa Giaggia to other families :-)