Sootch & I picked ours up from Marshall
at the IV8888 shoot, last monsoon.
I haven't shot with mine mounted yet,
but one feature I really like is the ability
to mount or dismount the light in seconds.
This allows you to dismount to use as a hand
held, like sweeping rooms, and remove the
muzzling concerns, but also allows you to
quickly remount as needed. I don't intend
to buy a holster to carry it mounted, because
I believe it the light will cycle on & off a lot
with side pressure in the holster from,
standing, sitting, etc, so the toggle protruding
a little is a non issue for me. The toggle also
allows me readily mount it on any firearm I
have with a picatinny rail.
Also, I believe the delay in the light coming on
is a common issue with LED lights in general.
Another feature I like for the Valkyrie is that it
can use the 3.6v rechargeable batteries.
I really like it & I intend to buy another one or
two.
John