Peter R.wrote a review of Edelrid HMS Strike Slider FG Locking Carabiner on November 2, 2016
Familiarity: I've put it through the wringer
Just picked one of these up to use as a leash biner on fixed lines (above the ascender), and also as a quick means of clipping into anchors on multiple pitch raps. Worked brilliantly for both. Other folks with screw gates were fumbling with gloves on, and either slowed the group or didn't lock their screw gates. Auto-lock feature a real plus.