I tried one today and liked it.
I was surprised how strong the flavor was.
Some Red Gem…
They do get softer as they hang and become less astringent and more sweet.
If you like sour and don’t mind astringent, go for it as soon as the color is uniform. If you want to see how sweet and non-astringent they can get, let them hang until they are soft and you risk breaking them upon removal. (the birds will have eaten them all by then )