Poncirus fruit

After all the flowers this spring, the Poncirus trifoloiata has some fruit. They look quite appetising but are too sour and sometimes bitter to make them into anything. Though according to Wikipedia, though not edible fresh, "they can be made into marmalade, and when dried and powdered, they can be used as a condiment." Is there anybody in Blipworld who has had the courage to try this?