This website is for the non-profit organization called "La Grande Famille de Procida & Ischia". If you joined the organization you could actually view the original records of your ancestors that are recorded in the church/parish registers.
There is a reasonable yearly fee ($50-$60 depending on the exchange rate) of course, but the funds go towards funding the organization's projects to collect, preserve and publish the records on the islands of Procida and Ischia.
If you are seriously interested in your genealogy/ family history it would be worth the small investment to build your family tree. The only other option would be to spend $2000 hiring a professional genealogist.
I have been able to trace my Ischian family tree back 5-6 generations to my 7th Great Grandparents including mutiple branches of the Calise family.
Hopefully this helps you find your family,