In reply to UKC Gear:
I've been using one for a few days now in and out... Can't see it catching on to be honest for a few reasons. I've only used it on belay and anchors as it's far too fiddly to use on anything else. My thoughts:
The gate doesn't open wide enough. When clipping it through 2 rope loops and a belay loop with a belay device attached, it's border line not possible. And requires a lot more thought and attention.
The movement to open the gate is really unnatural... If the twin gate is upside down, it's almost impossible to do one handed... It has to be done the correct way up, if it's upside down, you have to turn it round.
You have to use your whole hand to keep the gate open. With say a Boa, you can use one finger to hold the gate open and then you can hook things with the biner... You can't do this with a twin gate, it's like using chopsticks.
The fiddle factor... Hanging on one arm you'd have no change of doing one hand clove hitch to get your hanging belay started. You'd have a lot more chance of dropping it too. I would say it's almost useless in this sense.
Also the anodisation is rubbish. I've only used it on 3 - 4 sessions and it looks terrible already.
This has already been relegated to my indoor kit purely as a belay biner. Just a novelty for me I'm afraid.
Hope this is useful to you all.