Citrus macrophylla is not the most edible Citrus, I wouldn't say it tastes particularly bad, but it doesn't have a clean flavour like lemon or lime.
So far it seems pretty bomb proof, fruit hang on the tree for ages, don't seem to get attacked by anything.
C.macrophylla also seems to be fairly tough plant for rootstock use, and fairly vigorous.
Also I am interested in Papedas overall, so growing a few types even though some aren't the most useful fruit.
( I am in a Citrus growing area, so can get regular fruit types fairly easily most of the time ).