This one is not bad, there is nothing offputing unless you hate frosty sensation.
The thing is that you won't reach great blueberry flavor with this only, it is only good as an addition to other blueberries, and what it brings to the table is its frostiness that is not the same thing as just adding WS23 to your mix (I tried).
So as a blueberry only, not worth it, 2 stars. But as something to add a bit of blueberry sourness and a nice dose of blueberrized frostiness, it is definitely worth it, hence 4 stars.
My favourite blueberry, and throws out the richness of blueberry that edges on a kind of candy, but tastes great in my mixes