I'd point out that the best jacklines are probably 1/4" or 5/16" spectra core-line with tubular webbing over it... the webbing acts as chafe and UV protection and also serves to make the jacklines easily identifiable under any conditions. THe webbing also makes it less likely to roll underfoot.
* Plain webbing would roll even less. If I had a monohull I would opt for webbing and annual replacement.
* The carabiner will slide better on rope. Webbing or webbing with a core is not used in industry or by climber in this application. webbing over spectra core is common for lifting slings, so the idea has president.
* The price is excessive.
* It is impossible to inspect the line, as the rope is not visible. This will lead to premature replacement.
Very high tech with some benefits, but still a compromise, I think. I have probably done more time than anyone on the board climbing (a guess, but it is a lot spread over 25 years, including small cliffs, big mountains, rock climbing, and ice climbing) and I don't think it is a system I would take up a mountain or use in an industrial facility.