I've been using airbnb for 10 years now and this is THE BEST experience I had with airbnb so far!
First, Marina di Ragusa seems to be one of the best (if not the best) beach areas in Sicily! The town has an amazing atmosphere and the beach is perfect - clean sand, showers, palm trees. Easy to reach even without the car (though car would be nice to have to visit some nearby sights).
The apartment is simply amazing! It has everything you might need and everything you find in the apartment is of a very high quality and style, starting from mattresses, sheets and towels and finishing with kitchenware and appliancies. The apartment is very quiet and being just 100 m away from the main square you hear no noise at all - neither from people nor from traffic. There are 2 terraces in the house, which are very pleasant. It feels fresh in the apartment even during the hottest part of the day (with +32 during the day we did not even feel like using A/C).
And, of course, Luca! He is the most attentive and helping host genuinely interested in his guests and in providing them with the best vacation experience.
I highly recomend the apartment. If you are looking for accomodation in southern Sicily, do not hesitate to choose this one!