The balata house is really nice for summer holidays. You have air conditioning in the living an sleeping room. Two fully equipped kitchens and a beautiful terrace.
We did not meet Maria Pia, but Francesco. He is a nice guy and helps with any questions by contacting him.
I can recommend the accommodation, but you have to know that there is no supermarket or pharmacy in Calabernardo. You have to drive for example to Noto or go shopping on the way. We knew before and had a rental car so it was no problem.
The view from the terrace over the sea is really nice and you just have to take a few steps to get to the sea with clear water and sandy beach.
Have a nice stay :)