They are designed for combat, and that's what the guy who created them says upfront. I can see them for the military, but I have trouble with the idea that there is much of a civilian market for them, past the Star Trek-y cool factor of playing with one.
First, they are essentially double-bladed daggers, and as such, at the top of the can't-carry-concealed lists in pretty much every state knife law. (No hidden dirks, daggers, or bowies.) So you'll have to wear them on a belt and make sure your jacket or shirt doesn't hide them to haul 'em legally. And, not all states even allow belt-carry of double-edged knives, something I discovered when I started fiddling with kerambits that came that way.
No, it doesn't make any sense that a four-inch dagger is illegal but an eight-inch Bowie isn't. Knife laws are arcane -- my nephew and I spent an hour online researching California viz carrying a pocket knife, and even with the statute right in front of us, deciphering it was like trying to read Navaho code -- the law is full of double-negatives. What we came up with was that you could carry a pocket knife of about any length as long as it was folded. Switchblades had to be less than two inches. No gravity or flick knives at all. Nothing open or fixed concealed at all. And I wouldn't bet much we got it right.)
Second, this Garrison ain't no Girl Scout pocketknife, it has no utility uses, as specified by the maker. It's a fighting weapon, and when the jury at your criminal and subsequent civil trial get a look at this critter, the prosecuting attorney and the one for the plaintiff's family are going to have orgasms watching the looks on the jury's faces. Whatever status you had as a victim is going right out the window as you morph lycanathropically into hitman assassin right there ...
I am no expert, but I also don't see much the demo shows with this knife that can't be done with a single-blade dagger, or even a single-edged blade, as least insofar as being able to pass an attacker's blade.
I'd be interested in what other folks who play with knives think, though. Am I missing something?