BT has a regular yerba mate and this, which is a dark roast version. I thought this would be a great alternative for coffee but thats not quite the case. Its has roasted notes of grain but more herbal tasting, nothing like the earthy, chocolate-y sweetness of coffee.
Initially I tried this unsweetened but found the regular flavour much too herbal-y and medicinal, so added a tsp of honey, and all was good.
Caffeine-wise it seemed to provide a bit of alertness that lasted for a while, rather than the up and down crash of coffee.
This is organic as well and comes in an unbleached tea bag.
Flavors: Grain, Roasted Barley, Toasted