An over engineered solution to a problem that never existed. IMHO
More like an over-engineered answer to a very specific market demand. If you haven't noticed, every time there's a kite-related accident or fatality a certain number of riders fall into some kind of hysteria and start running around like crasy while buying line-knives, inflatable boats, emergency flares, satellite phones and post-shark-sighting diapers.
Unfortunately, unless the end of you leash is attached to the "flying-away" part of the spreader bar, Mystic's "solution" brings nothing but redundancy to the primary (chicken-loop) release. Basically a solution that solvers nothing while people were asking for a harness that can be ditched as one's last resort.