So I have been climbing with the adjuster for a few weeks now. It runs very smoothly with KMIII 7/16". Tends like a dream.....but applies just enough friction so it doesn't goggle up your lanyard every quick move you make (like the ART positioner can do). Tends much like the Bone on a good line. Its release it nice. It took a day of practice to get it down but there are many ways and positions to make the device release.
Under heavy load, it can be a little jumpy, but under usual circumstances, it is smooth and you can always grip the rope a bit if all your weight is into it. The Sugru I put on isn't quite necessary and probably makes a work of art look like a child's toy, but I am a creature of comfort...naturally.
I originally had the nano swivel installed and liked it quite a bit. But I found this yates tether, shortened up a bit, gives you plenty of movement side to side, and for me personally, puts the adjuster in a more comfortable position (much like a hitch).
You cannot use this device in a single line configuration. It will slip without a doubt. At certain times, when unusual amount of pressure are put on the adjuster, it will slip slowly. For instance, if I am pushing over a back-leaning top or in certain awkward positions where your lanyard may be below your hips. This is the only real "con" I have experienced thus far.
I don't know how the adjuster performs in sappy conditions as I use a wire-core for conifers.
Overall, great device Gordon!
