Amino acids are good, but looking at the 'supplement facts' and ingredients of these pricey products, I don't see anything here you can't get elsewhere much cheaper.
What kills me is that these are being promoted as some sort of breakthrough new discovery - when the benefits of aminos have been known and studied for years now.
Check this link out at Supplementwatch.com for info.
I'm not saying that this isn't a good product...I haven't tried it so I wouldn't know - but IMO this is an example of putting a new 'marketing spin' on something that's been around for awhile. I see on their website they have lots of testimonials (paid endorsements no doubt) and focusing their marketing to athletes and aspiring athletes. But IMO, as I've said, there is nothing new under the sun and to my unexpert eyes, I just don't see ANYTHING new here to warrant the high markup...