Yerba Mate is supposed to be a better caffeine source than what you get in a lot of other things. Skratch is not so unusual, but more expensive than the Liquid IV I usually get at Costco, so it's a treat to get some for my longer trail runs because it's supposed to be gentler on your stomach.
The thing I'm really stoked is my wife gave me a coupon for permission to plan a Mont Blanc hut to hut trail run! Major bucket list there!