I was watching a youtube clip on these units in action, from a distributor in the UK from memory, and what I noticed was the soft shackle was fitted with a wear sleeve and the donut rotates directly on that surface rather than the rope. I thought that would probably be enough to get me to purchase one as the interface surface between the rope and ring is my only concern. I think they are a really simple device and improvement in a lot of conditions, but still holding onto the snatch block until I see some more feedback.