I've got a Vanguard 1 that I use to secure a loaded weapon that I've unholstered without having to unload the gun before reholstering it or putting it in another holster. It's good for when I'm jockeying around a lot of different gear in the trunk. I have never carried with the Vanguard 1 on my person.
The Vanguard 2 takes another step in the direction of carry on-person with it. I like that it has a belt loop and it appears tuckable. Here's the problem that I see with it. Once these are out people are going to start carrying with them. With the old Vanguard 1, if you drew the weapon, the trigger-protector would come out of your pants as well and be retained by the cordage. So reholstering would just require putting the trigger-protector back on the trigger guard and then sticking it back in your pants. With the Vanguard 2, drawing the weapon will leave the trigger-protector in your pants and still attached to the belt by the belt loop. But it's not a traditional holster with a wide open mouth for reholstering, so I see the possibility of someone (perhaps careless, perhaps a lapse of judgment, perhaps under the stress of just shooting someone in self defense) trying to reholster the weapon back into the trigger guard that is all the way in their pants, and possibly blowing off a nut or half of their ass.
The ability to quickly and safely reholster is very important to me, and I don't see the Vanguard 2 as having that. Innovative product, though.