ha! i just ordered one of those today(mouse biner). never used one, but wanted a small biner. i hope i can get used to it.
I bought 2 ISC mouse biners some weeks ago to try. Until now, I had only quarter turn biners, but the french laws ask for triple auto lock carabiners. I wanted small biner to put on the bridge (sequoia) and with a flat top to keep the hitch, pulley and the "splice" biner at the same place without conflict.
For this part, it works. But actually, it's a pita for me to use it. In fact it's too small. -You need both hands to open it nearly all the time.
-The bridge gets stuck under the gate and the biner doesn't slide no more when it comes near the rings (web's end and sews).
-There isn't enough room between the gate and the top, even my 8mm hitch cord is in the way to open the gate.
To remove the biner off the saddle, I have to take out the "splice biner", push back the hitch and pulley, push the bridge far from the opening, then open the biner and now the bridge can leave the biner.
Easy , isn't it?
It's the new 6 movements security biner !
It doesn't make me a fan of the triple auto lock carabiners. Maybe I have to try an other model.