Ok, does anyone have any evidence that this works? A mix of herbal stuff that is supposed to help you out?
Well, it looks like their major active ingredients are "adaptogens", inosine, and whey protein.
"Adaptogen" can mean pretty much anything an herbalist wants it to, so I can't speculate on those, could be useful, could be useless.
As far as inosine, here's the only studies I could find with a cursory pubmed search, which basically found no benefit.
Those 3 studies only had 25 subjects between them, so not necessarily conclusive, but not a good sign if you're looking to spend $40 a bottle on that stuff. The fact that their ad claims inosine is beneficial with the existing evidence to the contrary isn't a good sign either. ("Inosine appears to work by making ATP last longer"?? That's a nice hand-waving explanation.)
But hey, whey is good stuff!
I personally take O2 Gold Advanced and it works. Approximately 30 minutes after taking the 2 tablets, I notice my breathing becomes easier. I am able to take deeper and more productive breaths while running. I would recommend trying it.