i've used it for a few months in the past when i was Carbon dosing and honestly i'd have to say that it's like the rest of the snake oil that is out there
it looks nice and smells bad...i never personally noticed any of my corals doing better with it or without it when i was Carbon dosing so i don't use it anymore, still have over half a bottle left
maybe it's something i'd add on water change days or 2-3 days weekly but i personally couldn't tell wether it improved my color's or anything
IMO an 80 proof bottle of Vodka is worth more than the amino's, lol