I brought in a bag when I heard about it a year ago, give or take.
I had great expectations but was a little disappointed with the outcome. I was expecting something like espresso in grind and extraction but it was more like using Guayaki Mate in the gaucho grind - very fast extraction even when tamped with all my weight and polished with weight. I think the product could show some real promise with a little bit more honing of its consistency. The flavour was a little 'dirtier' than regular rooibos as extracted in a tea form.
I should try it again because it sure looked cool and makes a neat option.