Sorry, nope! I've had no reason to. Online reviews seem to be pretty good, but some people online think buckwheat tastes great too, so use as many grains of salt as you need.
I have two variants (one of which I found serendipitously in the back of the fridge), plus two cookbooks, which I am intending to bring to the house cooling on Saturday, so that you can taste/borrow them as appropriate.
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