I had a chance to play with this over the weekend.
Overall I was pretty impressed, good product, worked as advertised, I jumped up and down on it hung as a tether trying to get it to jam and it would break either way with 2 fingers. The hitch works very well. I've been known to use a versastrap to bypass branches, so definitely safer and easier than that as a backup linesmans. I think the system also has potential as an aftermarket bridge, very easy to adjust.
I hate the microdiameter line for a linsemans, I just don't like the diameter, it's relatively stiff and flips well for the size, but there is such a thing as too minimal.
After testing I would mostly trust it. it's definitely better than the crap alot of the treestand manufacturers are supplying. The rating of the system though is pretty poor, Brocky had it worked out at 10kN for the spliced line, I think you can be in a similar weight & volume with sewn webbing at about 18kN. Nutterbuster had a tether/bridge system that would have rated out around there using Austrialpine buckles and Aerohunter has a linesmans belt and tether using similar buckles that rates out there as well. I don't see a need to go this minimal chasing weight. 9mm canyoneering line and 6mm accessory cord pack really well, weigh slightly more, are rated much higher and I find to be easier to use. I guess to each their own, at some point the manufacturers will have to get together and argue about how low is too low I expect.
That hitch is impressive. Works well enough that it has potential in a JRB style SRT system. I haven't played around with a JRB ascender on a single line, and had never heard of the synergy X, so I might figure out how to tie those and do some SRT hitch climbing. That might be my next steps.
Thanks for all your input.