Had mine for a few smaller climbs now. LOVE IT
arbormaster, 34" grizzly spliced beeline, hitch climber, short tether girthed on to the biner in and around the pulley and prusik.
yes, on swings and descent it is really smooth.
coming from the kong robot/hitch SRT setup, the rope wrench is sooo much smoother - i don't even have to think about what happens when I want to ascend again.
midline attachable would be nice, but easily worked around. I probably wouldn't do that much anyhow (but I bet i would do it on a Uni.
As to the smoother sides and smaller bolts, for me it would be less about the risk of sharp edges hitting rope (it would be hard to side load the thing) and more about not snagging or cutting into bark when pulling the RW/hitch thru a crotch on a redirect. I did that yesterday, it got hung up trying to go thru a quercus agrifolia crotch and did a little bark damage before I realized. Of course, the oak is tender right now, but now I will know to look out for this in the future. Maybe I'll make a little bag to slip over the whole rig for smoother redirects.
oh, and the rope wrench? I LOVE IT.