I've eaten them before, and tried to germinate seeds with no success to my surprise.
they were at fruit and spice park, under the tree and on the tasting table.
the texture is granular, and the flesh is somewhat milky.
they have a nice flavor, but the granular (mushy/mealy to some) texture will offend a considerable amount of those who sample this fruit.
I say it's a winner though. It must have unique medicinal and nutritional values..and I'm certain there are superior varieties...it's probably great for milkshakes and other recipes, and it can fruit in a pot for years.
its a collectors tree though. not going mainstream in our lifetimes.