I've had all the usual leash/rope combos over the years: aluminum rings, aluminum thimble, bomber ring, rope threaded through 1", rope threaded through 19mm, and just 12mm rope. This is a pricey upgrade, but IMO it is well worth it. The ring is incredibly light and the sewn connection reduces bulk and snagging. If ring shake annoys you this is the solution. It is large enough to fit over my double pin weblock during rigging. The rope has good texture for climbing back up, the pattern simplifies sorting out twists, and untying the leash after many whips was easier than any of the threaded leashes I've used.
The leash and ring are great to use and super light. Would really recommend. The leash is great to climb and doesn't get twisted too much
Lightweight, large ring, excellent grip : the leash you actually forget when on the line. And it doesn't hurt you even on the weirdest leashfalls ;-)
Great grip, lightweight, big though light ring that slides easily over my split connection. Conclusion: expensive but top notch!