Villa Chiara is as amazing as on the photos - I actually don't think that the previous reviews do the magic of the place justice!
We, four adults and two toddlers, spent one week in Villa Chiara in December. It was the perfect house for children, as it has many many many toys, enough space to run around and we were provided with two cots for free. There is also a very big playground not too far from the house.
Marina di Ragusa itself is a classic Italian seaside resort. We were able to go for walks along the beach before enjoying some Sicilian sweets in the cafe on the main square. The town is also conveniently located for sightseeing - we especially liked Syracuse (1.5 hrs away).
Lastly, the local caretaker Bozena was very friendly and efficient in taking care of everything. We would love to be back one day!