Best way to enjoy Quince...
I've never known them to be eaten raw. But I did find this on the net:
AROMATNAYA Aromatnaya, a round yellow quince from southern Russia, has gained a reputation for being deliciously sweet when eaten fresh as well as cooked. Extremely aromatic (thus the name!), with a fresh pineapple-like flavor, it will have a dense texture when first picked (October) but will soften up in a few days. Beautiful small self-fertile tree with pale pink blossoms in spring will be hung with the golden globes of quince by fall. Ornamental as well as very productive and disease resistant, and hardy in zones 5-9. $29.99 3gal(4-5ft). http://www.justfruitsandexotics.com/Quince.htm
So, perhaps that is the kind you have.
I love membrillo (quince paste) w/ Manchego cheese on crostini w/ a sprinkle of minted olive oil. Mmmmm. You could make membrillo or quince jelly. Of course, you'd need more than one. Here is a link to a recipe: