Just got my first order of yerba mate from stash.com. Can't comment on the
quality because I have nothing to compare it too. I have not purchased the
proper equipment and have made a few pots in a french press. My order was
processed quickly and it was 3.5 days from the time I ordered the tea and
when it arrived on my doorstep.

I drink more than my share of caffeinated beverages in the course of a day
- strong African coffees, rich Asian teas, tempered with the occasional
rooibos or green tea. Frankly, I do not notice any caffeine-like effects,
probably because my tolerance is so high. Pleasant, leafy flavor, but with
the cooler water brewing, it is also quite smooth in texture. I can say it
falls into that "acquired taste" category and I will report back after I
have had some more experience.