If anyone is curious. I got one for my wife's glock 26. It "works" on the fn. It seems to hold the gun fine but the fn wiggles in the vanguard. And the guard doesn't completely cover the trigger guard.
i tried it out with the G26 a bunch of times. Honestly, i didn't think it was bad at all. my biggest complaint would be the cold slide is against my tactical muffin top and that once i draw the gun the vanguard isn't very comfortable (it kinda turned and poked me in the side).
as far as drawing the pistol. I didn't see any issues. You draw should be a positive and aggressive action anyway. not a slow pull out of the holster.