I have used it since summer 2018.
There is a huge difference is how smooth the Cane Creek collar spins vs the original preload collar from Race Face, making it easy to adjust the preload. the original Race Face collar with a tiny weak wood screw. But the Collar from Cane Creek was a big improvement, to the Robust Race Face Cranks, they served me well and took some abuse, but the collar and screw always annoyed me. So far I haven’t found anything negative about it.
The Titanium bolt bolt has also stayed secure for months, but I had to adjust the preload, it doesn’t loosen up fast like on the original Race Face preload collar, it can stay secure for months, so it’s more secure than the original preload collar.
The bolt has no signs of wear in months of use, which was not the case for the wood screw on original preload collar, which rounded off after fast.
The gold thread ring is not used for Race Face cranks, but for Sram cranks.
Flickr Photo Album: https://flic.kr/s/aHsmi3PwY3
Product Page: https://www.canecreek.com/product/crank-preloader/