I purchased the Probiotic water and the Bucha tea, ( grapefruit sage). The water has a nice clean taste. I liked the 24 ounce size which is not too small but not overly large and bulky. I think it will be well received in the market. The Bucha is delicious; no vinegar taste which is key. Nice smooth flavors. This too will compete well with other Kumbucha teas.
No self-respecting "Eye Tie" would be caught dead in Olive Garden. That said Olive Garden is successful, lots of locations throughout the US and Europe; but NONE in Italy.
Yerba Mate is an esoteric drink and I'm pretty sure the "sophisticated" drinkers wouldn't be caught dead drinking a Guayaki, let alone a Marley because they aren't "real".
That said, Marley is accessible. It's not an acquired taste. I think it has a commercial future because of wider acceptance among us normal folk.