The problem that I have with them (rigging rings in general) is the fact that it's marketed as a rope friendly improvement over a block. They have videos dropping 3000 pound chunks on them, and say this is good for the rope. First off, if it adds enough friction to actually hold a majority of the load, it is pounding the end of the rope. That's why blocks started to be used in the first place, to spread the force over a larger area. Secondly, dropping that kind of weight on that bend radius is lessening the lifespan of said rope, because the rope isn't loaded evenly. Is it as bad as wire rope, no, but saying that rigging with a block is wrong and this "new" way is right is complete utter bullshit. Thirdly, selling the idea like it's something new is ridiculous, because it's a fairlead, that's all. Their use goes back millennia on sailing vessels. The actual rings used are cool, and weren't being used in treework on a large scale, but they were always there. And I still can't wrap my head around using aluminum for rigging. I know it dissipates heat better, but how much heat is generated in normal rigging? My steel portawrap does fine, so why does something that generates way less friction need to be aluminum? Other than to wear out faster, I can't see the point