Not as fast as a bumpfire stock but looks interesting.
Seems controllable and may get faster with practice.
Still, $495 is a bit steep for me. Probably have a hard time finding one at that price, too.
From the website:
3 Mode Drop-In Trigger
3rd Mode Has a Positive Reset Characteristic
Semi Auto is a Match Grade 4 1/2 Pound Pull Rate
Offers Zero Take-Up & No Overtravel
$495.00 Retail
Components are Full EDM & CNCd in House
Components are Coated with NP3 (Nickel Teflon)
3 Mode Billet Selector Included
BATFE Compliant/Non-NFA Letter