Whoa!
First off, you keep saying "this" and "it" as if it were a single product. It's not. It's a whole line of them (35 and counting), and, even if they work, you need a whole shelf of them to replace (or supplement) the flavors you get from your spice rack, fresh herbs, and extracts.
Second, I disagree with Nan. They are not cheap; not at six bucks a throw. Even a modest number of flavors, say a dozen, adds up to $72. That buys a lot of real spices and flavorings. Buy all 35 and you're talking more than 200 bucks.
And third, they apparently don't work as advertised. Not unless you really super-saturate your food with them.
Me, I'll stick to real foodstuffs. There are enough chemicals in our lives as it is.