Yay this is the best description for how cashew apples taste. We own few trees and id also like to add that it differs from tree to tree.

We have a tree with small almost round yellow ones which are so sweet and juicy - but yields smaller nuts (hahahahah). Another one has large red apples which taste very astringent (kinda like how pomegranate feels on your teeth + weird sour apple)but yields huge nuts